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High-fidelity four-photon GHZ states on chip npj Quantum Inform. (IF 7.6) Pub Date : 2024-05-15 Mathias Pont, Giacomo Corrielli, Andreas Fyrillas, Iris Agresti, Gonzalo Carvacho, Nicolas Maring, Pierre-Emmanuel Emeriau, Francesco Ceccarelli, Ricardo Albiero, Paulo Henrique Dias Ferreira, Niccolo Somaschi, Jean Senellart, Isabelle Sagnes, Martina Morassi, Aristide Lemaître, Pascale Senellart, Fabio Sciarrino, Marco Liscidini, Nadia Belabas, Roberto Osellame
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Non-Hermitian polariton–photon coupling in a perovskite open microcavity Nanophotonics (IF 7.5) Pub Date : 2024-05-15 Mateusz Kędziora, Mateusz Król, Piotr Kapuściński, Helgi Sigurðsson, Rafał Mazur, Wiktor Piecek, Jacek Szczytko, Michał Matuszewski, Andrzej Opala, Barbara Piętka
Exploring the non-Hermitian properties of semiconductor materials for optical applications is at the forefront of photonic research. However, the selection of appropriate systems to implement such photonic devices remains a topic of debate. In this work, we demonstrate that a perovskite crystal, characterized by its easy and low-cost manufacturing, when placed between two distributed Bragg reflectors
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Ionic control of magnetism in all-solid-state CoOx/yttria-stabilized zirconia heterostructures Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-15 Zheng Ma, Zhengwei Tan, Alberto Quintana, Irena Spasojevic, Nicolau López-Pintó, Florencio Sánchez, Ignasi Fina, Javier Herrero-Martín, Enric Menéndez, Jordi Sort
Magneto-ionic gating, a procedure that enables the modulation of materials' magnetic properties by voltage-driven ion motion, offers alternative perspectives for emerging low-power magnetic storage and spintronic applications. Most previous studies in all-solid-state magneto-ionic systems have focused on the control of interfacial magnetism of ultrathin (i.e., 1–3 nm) magnetic films, taking advantage
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Efficient magnetization switching induced by spin–orbit torque in perpendicularly magnetized Mn1+xCo2−xAl Heusler alloys Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-15 Hongrui Qin, Xupeng Zhao, Rongkun Han, Hongli Sun, Zhicheng Xie, Dahai Wei, Jianhua Zhao
Perpendicularly magnetized Co-based Heusler alloys are promising candidates in high-performance spintronic devices. However, there is a contradiction between thermal stability and damping-like spin–orbit torque (SOT) efficiency in Co-based Heusler alloys with interface-induced perpendicular magnetic anisotropy (PMA). Here, we present epitaxially grown perpendicularly magnetized Mn1+xCo2−xAl (MCA) Heusler
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Giant polarization in tetragonal-like BiFeO3 film via (Ba,Ca)TiO3 doping Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-15 Teng Li, Beibei Zhu, Hao Zhuo, Shudong Hu, Yiwen Liu, Botao Shao, Ke Wang, Dongsheng Song, Liqiang Xu, Feng Chen
BiFeO3 is a multiferroic material, its tetragonality (T) phase usually exhibits large tetragonality (c/a ratio) and strong ferroelectricity. Unlike the commonly used method of strain engineering via substrate, here we present a general and practical approach for obtaining T-like phase BiFeO3 films through (Ba,Ca)TiO3 doping (BF-BCT). The BF-BCT film coherently grows on the La0.7Sr0.3MnO3/(La0.18Sr0
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Superconducting quantum memory with a suspended coaxial resonator Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-15 Lev Krayzman, Chan U Lei, Suhas Ganjam, James Teoh, Luigi Frunzio, Robert J. Schoelkopf
A promising way to store quantum information is by encoding it in the bosonic excitations of microwave resonators. This provides for long coherence times, low dephasing rates, as well as a hardware-efficient approach to quantum error correction. There are two main methods used to make superconducting microwave resonators: by traditionally machining them out of bulk material and by lithographically
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Edge passivation: Considerable improvement in photovoltaic performance of perovskite/silicon tandem solar cells Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-15 Bingbing Chen, Mengnan Cui, Xinru Wang, Hao Meng, Yuhua Bai, Wenheng Li, Xiao Wang, Xuning Zhang, Jianhui Chen
Edge recombination is considered hard to avoid entirely in silicon (Si) solar cells as well as Si-base solar devices, hindering their future commercialization. However, such an important issue in perovskite/silicon (PK/Si) tandem solar cells has not attracted much attention. Herein, a low-temperature, non-vacuum liquid-based edge passivation strategy (LEPS) to improve the power conversion efficiency
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Collective control of a vortex array in a ferroelectric ultrathin film Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-15 Bo Ruan, Pengcheng Xiong, Qingyuan Liu, Ye Ji, Shuai Yuan
Recently, the observation of ferroelectric vortex arrays has triggered the investigation of topological domain structures and their characteristics. Vortices are typical topological domain structures with chirality in nanoscale ferroelectric materials. The chirality of a single vortex in a nanodot can be easily manipulated, but the collective control of a vortex array is exceptionally difficult and
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High heat transfer plant-inspired neural network structure controlled by variable magnetic field Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-15 Dachao Li, Taisen Shi, Jianhua Li, Chunling Li, Zhifeng Shi, Tongkai Gu
Efficient heat dissipation and thermal protection present urgent challenges in high-power integrated circuits (ICs). Although applying a coating of highly thermally conductive materials on the surface of ICs is anticipated to mitigate heat concentration issues, ensuring thermal protection for adjacent devices continues to pose a challenge. Inspired by the microstructure of unidirectional nutrient transport
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Investigation on self-rectifying properties of Pt/HfO2/Ti with rivet-like structure based on ALD conformal technology Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-15 Kexiang Wang, Jie Lu, Zeyang Xiang, Ranping Li, Zixuan Wang, Huilin Jin, Ran Jiang
This work explores an architecture for nonvolatile resistive random-access memory (RRAM) systems. The study proposes a self-rectifying RRAM device utilizing a two-terminal 1R selector that harmonizes the gate control efficacy of transistors with the inherent simplicity of diode structures. A rivet-like HfO2-based RRAM array is meticulously constructed through atomic layer deposition (ALD), aiming to
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Broadband noise-like pulses in fiber laser based on a filter Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-15 Yichang Meng, Oumaima Ougrige, Florent Bessin, Mohamed Salhi, François Sanchez
We report on the generation of broadband noise-like pulses in an Er:Yb doped fiber laser with a tunable bandpass filter in the cavity. Benefit from the filter enhanced spectrum at shorter wavelengths and Raman effect assisted spectrum at longer wavelengths, an excellent flat spectrum with a 3 dB spectral width of 130.2 nm is obtained. This is different from previous traditional methods to achieve broadband
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High temperature stability of regrown and alloyed Ohmic contacts to AlGaN/GaN heterostructure up to 500 °C Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-15 John Niroula, Qingyun Xie, Nitul S. Rajput, Patrick K. Darmawi-Iskandar, Sheikh Ifatur Rahman, Shisong Luo, Rafid Hassan Palash, Bejoy Sikder, Mengyang Yuan, Pradyot Yadav, Gillian K. Micale, Nadim Chowdhury, Yuji Zhao, Siddharth Rajan, Tomás Palacios
This Letter reports the stability of regrown and alloyed Ohmic contacts to AlGaN/GaN-on-Si high electron mobility transistors (HEMTs) for high temperature applications up to 500 °C. Transfer length method (TLM) measurements from 25 to 500 °C in air show that the regrown contacts appear to be stable up to 500 °C during short term (approximately 1 h) testing, while alloyed contacts appear to decrease
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Fabrication of surface nanoscale axial photonics structures with electric arc discharge Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-15 Wenxin Liu, Xuewen Shu
The fabrication of surface nanoscale axial photonics (SNAP) microresonators, utilizing the approach of electric arc discharge (EAD), is accomplished, achieving a precision at the angstrom level. This paper thoroughly investigates the effects that discharge intensity and discharge duration have on SNAP microresonators, respectively, through the manipulation of relevant discharge parameters. The results
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Magnetic vortex control with current-induced axial magnetization in centrosymmetric Weyl materials Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-15 J. G. Yang, Yaroslav Tserkovnyak, D. A. Pesin
We consider magnetic Weyl metals as a platform to achieve current control of magnetization textures with transport currents utilizing their underlying band geometry. We show that the transport current in a Weyl semimetal produces an axial magnetization due to orbital magnetic moments of the Weyl electrons. The associated axial magnetization can generate a torque acting on the localized magnetic moments
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Spectroscopic investigations on trivalent ruthenium ions in ruthenium perovskite oxide thin films Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-15 S. Nakata, R. Takahashi, R. Matsumoto, L.-F. Zhang, H. Sumida, S. Suzuki, T. C. Fujita, M. Kawasaki, H. Wadati
The d5 electron configurations under the crystal field, spin–orbit coupling, and Coulomb interaction give rise to a plethora of profound ground states. Ruthenium perovskite oxides exhibit a number of unconventional properties yet the Ru4+ state (4d4) is usually stable in these materials. In this regard, Ru3+ ions in perovskite materials are expected to be a mesmerizing playground of 4d5 electron configurations
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Combining computational screening and machine learning to explore MOFs and COFs for methane purification Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-15 Hasan Can Gulbalkan, Alper Uzun, Seda Keskin
Metal-organic frameworks (MOFs) and covalent organic frameworks (COFs) have great potential to be used as porous adsorbents and membranes to achieve high-performance methane purification. Although the continuous increase in the number and diversity of MOFs and COFs is a great opportunity for the discovery of novel adsorbents and membranes with superior performances, evaluating such a vast number of
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Increased thermal conductivity and decreased electron–phonon coupling factor of the aluminum scandium intermetallic phase (Al3Sc) compared to solid solutions Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-15 Daniel Hirt, Md. Rafiqul Islam, Md. Shafkat Bin Hoque, William Hutchins, Sara Makarem, Megan K. Lenox, William T. Riffe, Jon F. Ihlefeld, Ethan A. Scott, Giovanni Esteves, Patrick E. Hopkins
Aluminum scandium alloys and their intermetallic phases have arisen as potential candidates for the next generation of electrical interconnects. In this work, we measure the in-plane thermal conductivity and electron–phonon coupling factor of aluminum scandium alloy thin films deposited at different temperatures, where the temperature is used to control the grain size and volume fraction of the Al3Sc
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Robust chiral spin transport in the antiferromagnetic iron oxide/heavy metal bilayers Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-15 T. Z. Zhang, K. K. Meng, Y. Wu, J. K. Chen, X. G. Xu, Y. Jiang
We have observed robust chiral spin torques and non-reciprocal charge transport behaviors in the α-Fe2O3/Pt bilayers through a combination of magnetic field and current-dependent second longitudinal harmonic resistance measurements. The interfacial Dzyaloshinskii–Moriya interaction induced magnetic chirality has been predicted to account for the sign reversal characteristic of the second longitudinal
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Toward low-power-consumption source-gated phototransistor Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-15 Mingxu Wang, Fengjing Liu, Tieying Zhang, Guangcan Wang, Zixu Sa, Zeqi Zang, Dongqing Qi, Kepeng Song, Peng Cui, Zai-xing Yang
The power consumption is challenging the next-generation electronic and optoelectronic devices. In this Letter, the n-type source-gated transistor (SGT) enabled by CdS nanobelt is investigated in detail, demonstrating the expected low power consumption, along with impressive photodetection performance. The SGT is realized by deliberately introducing the Schottky barrier at the source of the staggered-electrode
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A high-robustness radial intensity-orientated mode decomposition with reliable noise elimination Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-15 Jianshuai Wang, Li Pei, Lin Xu, Kaihua Hu, Zhiqi Li, Han Gao
Mode decomposition (MD) provides profound evidence to reveal the internal modal transmission mechanism. However, the indelible noise has always been the main stubborn hindrance in practical MD. In the complex superposition case with a large number of modes, the traditional MD is not capable enough to distinguish the real modal intensity and the annoying noise, sustaining an unacceptable accuracy and
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Giant optical nonlinearity of Fermi polarons in atomically thin semiconductors Nat. Photon. (IF 35.0) Pub Date : 2024-05-14 Liuxin Gu, Lifu Zhang, Ruihao Ni, Ming Xie, Dominik S. Wild, Suji Park, Houk Jang, Takashi Taniguchi, Kenji Watanabe, Mohammad Hafezi, You Zhou
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High gradient terahertz-driven ultrafast photogun Nat. Photon. (IF 35.0) Pub Date : 2024-05-14 Jianwei Ying, Xie He, Dace Su, Lingbin Zheng, Tobias Kroh, Timm Rowher, Moein Fakhari, Günther H. Kassier, Jingui Ma, Peng Yuan, Nicholas H. Matlis, Franz X. Kärtner, Dongfang Zhang
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Superior optical gain in zinc selenide colloidal nanocrystals induced by Coulomb-correlated electron–hole plasma Appl. Phys. Rev. (IF 15.0) Pub Date : 2024-05-14 Zhigao Huang, Hanchen Shen, Yiming Wu, Yuting Wu, Weigao Xu, Xie Zhang, Yue Wang
Colloidal semiconductor nanocrystals (NCs) have been recognized as promising solution-processable gain media; however, the lasers with state-of-the-art performance exclusively originate from the cadmium- and lead-based NCs. Herein, we for the first time unravel that high-quality heavy-metal-free ZnSe/ZnS NCs show superior optical gain and lasing performance when the sizes exceed the quantum confinement
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Artificial synapses based on boron ions-modulated transistors for neuromorphic applications Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-14 Guangtan Miao, Qingliang Liu, Yepeng Shi, Ranran Ci, Guoxia Liu, Fukai Shan
The development of large-scale manufacturing and cost-saving artificial synaptic devices is of great significance for the realization of hardware neural networks. In this work, the In2O3 synaptic transistors with boron ion-doped ZrOx as the dielectric layer were fabricated by the solution process. The large counterclockwise hysteresis indicates that the nonvolatile memory capacity of the synaptic transistors
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Two-dimensional epitaxy of SnSe film on In2Se3 induced by intrinsic out-of-plane ferroelectricity Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-14 Keying Shou, Jinbo Shen, Haifei Wu, Guiling Chen, Rong Chen, Xiangyu Zu, Juncheng Ding, Yajie Sun, Jianxiao Si, Yun-Hao Lu, Wei-Dong Dou
Two-dimensional (2D) van der Waals heterostructures (vdWHs) received intensive interest due to their amazing physical properties and broad applications in fields such as ultrasensitive sensors, transistors, and solar cells. Although remarkable progresses were achieved for the synthesis of 2D vdWHs, great challenges still remain for the easy preparation of 2D vdWHs because of the weak interlayer coupling
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3D surface profilometry using neutral helium atoms Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-14 Aleksandar Radić, Sam M. Lambrick, Nick A. von Jeinsen, Andrew P. Jardine, David J. Ward
Three-dimensional mapping of surface structures is important in a wide range of biological, technological, healthcare, and research applications. Neutral helium atom beams have been established as a sensitive probe of topography and have already enabled structural information to be obtained from delicate samples where conventional probes would cause damage. Here, we empirically demonstrate, for the
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Recess-free thin-barrier AlGaN/GaN Schottky barrier diodes with ultra-low leakage current: Experiment and simulation study Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-14 Jianxun Dai, Huimin Yu, Huolin Huang, Taisen Ye, Yun Lei, Nan Sun, Dawei Li, Hao Zheng, Hui Huang, Yung C. Liang
In GaN Schottky barrier diodes (SBD), there is a trade-off between the turn-on voltage and the leakage current. In this study, recess-free 4 nm-thin-barrier AlGaN/GaN SBDs with minimal leakage current as well as excellent turn-on voltage homogeneity are developed, which enable better electrical control to pinch off the 2DEG channel under the anode region and avoids trap introduced in the barrier etching
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Anomalous superconductivity in Li/F modified two-dimensional molybdenene Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-14 Hongmei Xie, Zhijing Huang, Yinchang Zhao, Hao Huang, Geng Li, Zonglin Gu, Shuming Zeng
Dirac materials, due to their unique physical properties, hold vast prospects in both fundamental research and practical applications. Recently, the metallic Dirac material, molybdenene, has been synthesized. However, free-standing molybdenene is found to be dynamically unstable. We propose the use of F/Li to modify its structure and stabilize it. Based on density functional theory, density functional
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Suppression of spurious modes in lateral-excited bulk acoustic wave resonators using piston mode electrodes Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-14 Jieyu Liu, Wenjuan Liu, Zhiwei Wen, Xin Tong, Yan Liu, Yao Cai, Chengliang Sun
Lateral-excited bulk acoustic wave resonators (XBARs) have a large electromechanical coupling coefficient and low mechanical loss. However, XBARs have not yet been commercialized in 5G communications due to spurious modes, high TCF, and low-power handling. This paper presents a lateral-excited bulk acoustic wave resonator with piston mode electrodes named PLBAR. Compared to the conventional interdigital
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Magnetic evolution of Cr2Te3 epitaxially grown on graphene with post-growth annealing Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-14 Quentin Guillet, Hervé Boukari, Fadi Choueikani, Philippe Ohresser, Abdelkarim Ouerghi, Florie Mesple, Vincent T. Renard, Jean-François Jacquot, Denis Jalabert, Céline Vergnaud, Frédéric Bonell, Alain Marty, Matthieu Jamet
Two-dimensional and van der Waals ferromagnets are ideal platform to study low-dimensional magnetism and proximity effects in van der Waals heterostructures. Their ultimate two-dimensional character also offers the opportunity to easily adjust their magnetic properties using strain or electric fields. Among 2D ferromagnets, the Cr1+xTe2 compounds with x = 0–1 are very promising because their magnetic
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Non-Hermiticity in quantum nonlinear optics through symplectic transformations Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-14 Ross Wakefield, Anthony Laing, Yogesh N. Joglekar
Over the past decade, classical optical systems with gain or loss, modeled by non-Hermitian parity-time symmetric Hamiltonians, have been deeply investigated. Yet, their applicability to the quantum domain with number-resolved photonic states is fundamentally voided by quantum-limited amplifier noise. Here, we show that second-quantized Hermitian Hamiltonians on the Fock space give rise to non-Hermitian
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Quasi-Bessel surface acoustic wave for dynamic acoustic manipulation Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-14 Jingyao Shi, Chunqiu Zhang, Pengqi Li, Benxian Peng, Xinjia Li, Xiufang Liu, Wei Zhou
Acoustic manipulation using surface acoustic wave has aroused widespread interest in life sciences, biomedical, and bioanalytical chemistry. Acoustic manipulation for different applications requires different acoustic fields. Bessel beams are non-diffractive and re-constructable, bringing possibility and versatility of acoustic manipulation integrated on microfluidic chips. To date, there are a few
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Terawatt-scale attosecond X-ray pulses from a cascaded superradiant free-electron laser Nat. Photon. (IF 35.0) Pub Date : 2024-05-13 Paris Franz, Siqi Li, Taran Driver, River R. Robles, David Cesar, Erik Isele, Zhaoheng Guo, Jun Wang, Joseph P. Duris, Kirk Larsen, James M. Glownia, Xinxin Cheng, Matthias C. Hoffmann, Xiang Li, Ming-Fu Lin, Andrei Kamalov, Razib Obaid, Adam Summers, Nick Sudar, Emily Thierstein, Zhen Zhang, Matthias F. Kling, Zhirong Huang, James P. Cryan, Agostino Marinelli
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Nanostructured binary transition-metal-sulfides and nanocomposites as high-performance electrodes for hybrid supercapacitors Appl. Phys. Rev. (IF 15.0) Pub Date : 2024-05-13 Mengxuan Sun, Xiaohe Ren, Ziwei Gan, Mingdong Liu, Yongxiu Sun, Wenzhong Shen, Zhijie Li, YongQing Fu
Supercapacitors (SCs) are attractive as promising energy storage devices because of their distinctive attributes, such as high power density, good current charge/discharge ability, excellent cyclic stability, reasonable safety, and low cost. Electrode materials play key roles in achieving excellent performance of these SCs. Among them, binary transition metal sulfides (BTMSs) have received significant
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Stable Ga2O3 soft x-ray detector with ultrahigh responsivity Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-13 Shunjie Yu, Yan Liu, Xiaohu Hou, Mengfan Ding, Yanni Zou, Yong Guan, Zhao Wu, Xiaolong Zhao, Qin Hu, Guangwei Xu, Shibing Long
Soft x-ray detectors play crucial roles in biology, chemistry, and lithography. Current soft x-ray detectors suffer from insufficient responsivity (R), excessively large cell area, and limited stability. Here, the β-Ga2O3 soft x-ray detector is constructed, and the effects of varying the sensitive layer thickness and voltage on the soft x-ray detection characteristics of the device are explored. Meanwhile
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Control of the oscillation frequency of a vortex cluster in the trapped polariton condensate Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-13 Kirill A. Sitnik, Ivan Gnusov, Mikhail Misko, Julian D. Töpfer, Sergey Alyatkin, Pavlos G. Lagoudakis
An optically trapped exciton–polariton condensate forms states corresponding to excited energy levels of the confining potential. Recently, it was shown that non-uniformity of the ring-shaped trapping potential leads to the simultaneous occupation of two split energy levels. This results in the formation of an oscillating vortex cluster with periodically changing signs of topological charges. Here
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Anomalous exchange bias behavior of NiFe/NiO bilayers induced by high-energy Xe+ ion irradiation Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-13 Yan Zhang, Bingsheng Li, Jun Li, Yong Wang, Yong Ren, Bo Dai
The alteration of the microstructure and magnetic performance of an exchange bias system, induced by ion irradiation, adversely affects the practical application of spintronic/storage devices in extreme environments. Here, we report systematically the correlation between static and dynamic magnetism and microstructure changes in NiFe/NiO exchange-biased bilayers after high-energy Xe+ ion irradiation
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Integrated thin-film lithium niobate electro-optic frequency comb for picosecond optical pulse train generation Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-13 Xuanhao Wang, Zhengkai Li, Junji Chen, Chenglin Shang, Zhiyao Zhang, Heping Li, Yong Liu, Cheng Zeng, Jinsong Xia
In recent years, high-performance thin-film lithium niobate (TFLN) electro-optic (EO) modulators boost the fast development of highly integrated, low loss, and large comb spacing EO frequency combs. Furthermore, ultra-short optical pulse trains (USOPTs) can be generated by the temporal domain compression of the optical frequency comb, which play an essential role in photonic sampling analog-to-digital
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Fabrication of planar halfmetallic ferromagnetic Josephson junctions with long range coupling Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-13 Junxiang Yao, Jan Aarts
Superconducting junctions with a ferromagnet as the weak link, where triplet correlations can transport supercurrents over a substantial distance, have been of long-standing interest. In this work, we study the triplet transport in planar La0.7Sr0.3MnO3 (LSMO) nanowire Josephson junctions with NbTi superconducting contacts. By meticulous ion etching with an artificial Pt hard mask, the NbTi/LSMO bilayer
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Understanding the microstructure evolution of carbon-doped Sb2Te3 phase change material for high thermal stability memory application Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-13 Mengyu Zhang, Ruobing Wang, Xixi Zou, Sannian Song, Yun Bao, Liangcai Wu, Zhitang Song, Xilin Zhou
The Sb2Te3 phase change material shows a growth-dominated crystallization mechanism with fast phase transition but poor thermal stability of the amorphous state. This work investigated the effects of carbon doping on the thermal stability, microstructure, and electrical properties of the Sb2Te3 material. The 10-year data retention temperature of the material increased to ∼147.3 °C and the size of the
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Large magnetoresistance and nontrivial Fermi surface topology in quasi-one-dimensional Ta2PdSe6 Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-13 Yuanyuan Wang, Zheng Chen, Wenqian Tu, Xiangde Zhu, Wenjian Lu, Wei Ning, Mingliang Tian
We report the experimental investigation of quasi-one-dimensional (quasi-1D) Ta2PdSe6 single crystals by magnetotransport measurements under high magnetic fields up to 31 T. The crystals show large unsaturated magnetoresistance up to (1.8 × 105%) under 31 T at 1.6 K, accompanied by remarkable resistivity oscillations. The analysis of quantum oscillations reveals the existence of five Fermi pockets
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Fourier Quantum Process Tomography npj Quantum Inform. (IF 7.6) Pub Date : 2024-05-09 Francesco Di Colandrea, Nazanin Dehghan, Alessio D’Errico, Ebrahim Karimi
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Graphene–fullerene heterostructures as robust and flexible nanomechanical bits Appl. Phys. Rev. (IF 15.0) Pub Date : 2024-05-10 Yixuan Xue, Harold S. Park, Jin-Wu Jiang
Electrical computers have revolutionized society over the past several decades, but questions have remained about their ability to perform in extreme environments, such as their stability at high-temperature conditions. This has motivated the recent surge of interest in developing mechanical computing platforms at all length scales, including the nanoscale, in which traditional electrical computers
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Nanophotonic route to control electron behaviors in 2D materials Nanophotonics (IF 7.5) Pub Date : 2024-05-10 DongJun Kang, Chibuzo Onwukaeme, KiJeong Park, KyeongPyo Jeon, Han-Youl Ryu, SeokJae Yoo
Two-dimensional (2D) Dirac materials, e.g., graphene and transition metal dichalcogenides (TMDs), are one-atom-thick monolayers whose electronic behaviors are described by the Dirac equation. These materials serve not only as test beds for novel quantum physics but also as promising constituents for nanophotonic devices. This review provides a brief overview of the recent effort to control Dirac electron
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Arrays of nano-high-transition temperature superconductor quantum interference devices Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-10 Hao Li, Han Cai, Nirjhar Sarkar, Jay C. LeFebvre, Ethan Y. Cho, Shane A. Cybart
We report the fabrication and testing of arrays of nanoscale superconducting quantum interference devices (SQUIDs) directly written into a thin film of the high-transition temperature superconductor YBa2Cu-3O7−δ with a focused helium ion beam. We compare three array configurations with 400 nm by 400 nm nanoSQUIDs connected in series and parallel and a two-dimensional (2D) combination of both. Our electrical
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Enhanced torque efficiency in ferromagnetic multilayers by introducing naturally oxidized Cu Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-10 Kun Zheng, Cuimei Cao, Yingying Lu, Jing Meng, Junpeng Pan, Zhenjie Zhao, Yang Xu, Tian Shang, Qingfeng Zhan
Spin–orbit torque (SOT) in the heavy elements with a large spin–orbit coupling (SOC) has been frequently used to manipulate the magnetic states in spintronic devices. Recent theoretical works have predicted that the surface oxidized light elements with a negligible SOC can yield a sizable orbit torque (OT), which plays an important role in switching the magnetization. Here, we report anomalous-Hall-resistance
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Petabit optical storage Nat. Photon. (IF 35.0) Pub Date : 2024-05-08 Giampaolo Pitruzzello
Now, writing in Nature, Zhao and colleagues report a new optical substrate and method for super-resolution optical data encoding and decoding, enabling an estimated storage capacity of 1.6 petabit for a standard DVD-sized substrate (M. Zhao et al. Nature 626, 772–778; 2024). The key enabler is a new optical data storage medium, a dye-doped photoresist that exhibits aggregation-induced emission (AIE)
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Bigger and better Nat. Photon. (IF 35.0) Pub Date : 2024-05-08 Rachel Won
Photonics West 2024 showcases a robust and growing photonics industry, as the field of silicon photonics works towards sustainable growth.
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Andrew M. Weiner (1958–2024) Nat. Photon. (IF 35.0) Pub Date : 2024-05-08 Jason D. McKinney, Joseph M. Lukens, Alexandra Boltasseva, Vladimir M. Shalaev
Andrew M. Weiner, a luminary in ultrafast optics and quantum photonics passed away on February 13, 2024, at the age of 65. He will be remembered for his profound contributions to the optics and photonics community, engineering, education, and for his devoted mentorship. He leaves behind a legacy of innovation and inspiration.
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Earth’s wobble probed by 16-m2 underground laser Nat. Photon. (IF 35.0) Pub Date : 2024-05-08 David Pile
A ring laser gyroscope, located at the Geodetic Observatory Wettzell in Southern Germany, measures variations in the Earth’s rotation. Nature Photonics spoke to a key researcher on the project, Ulrich Schreiber, about the system’s birth, teething issues, and how it may one day probe the El Niño effect.
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A novel nanoplasmonic-based diagnosis platform: Advances and emerging technologies Appl. Phys. Rev. (IF 15.0) Pub Date : 2024-05-09 Gyeong-Ji Kim, Sung Eun Seo, Seo Jin Kim, Kyoung G. Lee, Oh Seok Kwon
The development of a rapid, simple, inexpensive, and sensitive nucleic acid assay is critical in ultrafast diagnostic systems to prevent the rapid spread of novel infectious agents. However, current representative diagnostic methods, such as the polymerase chain reaction (PCR), are bulky, expensive, complex, and time-consuming. The plasmonic photothermal effect of plasmonic materials is widely used
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Casimir interaction driven by hyperbolic polaritons Nanophotonics (IF 7.5) Pub Date : 2024-05-09 Yang Hu, Xiaohu Wu, Haotuo Liu, Xiuquan Huang
Casimir interaction is an intriguing phenomenon that is induced by electromagnetic quantum fluctuations, which dominates the interaction between microstructures at small separations and is essential for micro- and nano-electromechanical systems (MEMS and NEMS). However, Casimir interaction driven by hyperbolic polaritons remains an unexplored frontier. In this work, we investigate the Casimir interaction
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Dyakonov surface waves in dielectric crystals with negative anisotropy Nanophotonics (IF 7.5) Pub Date : 2024-05-09 Dmitry A. Chermoshentsev, Evgeny V. Anikin, Ilia M. Fradkin, Mikhail S. Sidorenko, Aleksandra A. Dudnikova, Aleksandr S. Kalganov, Mikhail F. Limonov, Nikolay A. Gippius, Sergey A. Dyakov
Since the initial discovery of Dyakonov surface waves at a flat infinite interface of two dielectrics, at least one of which is positively anisotropic, extensive research has been conducted towards their theoretical and experimental studies in materials with positive anisotropy. The potential applications of these waves were initially limited due to the stringent conditions for their existence and
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Scale-invariant breathing oscillations and transition of the electron energization mechanism in magnetized discharges Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-09 Bocong Zheng, Yangyang Fu, Keliang Wang, Huihui Wang, Long Chen, Thomas Schuelke, Qi Hua Fan
Scale-invariant breathing oscillations are observed in similar magnetized discharges at different spatiotemporal scales via fully kinetic particle-in-cell simulations. With an increase in the similarity invariant B/p, i.e., the ratio of magnetic field to pressure, breathing oscillations are triggered, leading to an appreciable time-averaged potential fall outside the sheath. With the onset and development
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Enhanced thermoelectric performance of Cu2Se thin film derived from potential barrier scattering by incorporating SnSe nano-dispersions Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-09 Qing Wang, Zhiliang Li, Yuli Xue, Zhi Gao, Aiai Wang, Jianglong Wang, Shufang Wang
Incorporating nano-dispersions into thermoelectric (TE) materials is an effective approach to enhance the TE properties. Herein, the TE performance of Cu2Se thin film is significantly enhanced by incorporating highly dispersed SnSe nano-inclusions. The high power factor (PF, ∼11.0 μW cm−1 K−2, 310 K) at near room temperature is achieved mainly due to the enhanced energy filtering effect that originated
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Layer-dependence study of two-dimensional ferromagnets: Fe3GeTe2 and Fe5Ge2Te2 Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-09 Mohammed Alghamdi, Palani R. Jothi, Wei-Cheng Liao, Sinisa Coh, Xianqing Lin, Boniface P. T. Fokwa, Jing Shi
We have investigated the electrical transport properties of nanodevices fabricated from exfoliated flakes of two-dimensional metallic ferromagnets Fe3GeTe2 (FGT) and Fe5Ge2Te2 (FG2T) down to below three layers in thickness. The per-layer anomalous Hall conductivity even in thick FGT and FG2T devices is found to be much smaller than ∼e2h, the approximate value calculated for thick undoped crystals.
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The enhancement of low-temperature excitation of magnons via interlayer exchange coupling in perpendicularly magnetized [Co/Pd] multilayers Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-09 Julia Kasiuk, Wen-Bin Wu, Janusz Przewoźnik, Czesław Kapusta, Ivan Svito, Thanh Huong Nguyen, Khanh Tung Do, Dang Thanh Tran, Hung Manh Do, Johan Åkerman, Thi Ngoc Anh Nguyen
In this study, we analyze the correlation between magnetization and magnetoresistance of perpendicularly anisotropic [Co/Pd] multilayered films with different thicknesses of Pd layers tPd = 0.6–2.0 nm in a wide range of temperatures, T = 4–300 K. We revealed that electron scattering by magnons makes a significant contribution to the magnetoresistance of the multilayers regardless of the layer thickness
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Calculating the acoustic radiation force on spherical particles in a standing ultrasound wave field considering single and multiple scattering Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-09 Soheyl Noparast, Fernando Guevara Vasquez, Mathieu Francoeur, Bart Raeymaekers
Ultrasound directed self-assembly (DSA) utilizes the acoustic radiation force (ARF) associated with a standing ultrasound wave to organize particles dispersed in a fluid medium into specific patterns. The ARF is a superposition of the primary acoustic radiation force, which results from the incident standing ultrasound wave, and the acoustic interaction force, which originates from single and multiple
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Precise control of fatigue, wake-up, charge injection, and break-down in Hf0.5Zr0.5O2-based ferroelectric memories Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-05-09 Nannan Liu, Chunlai Luo, Hongdi Wu, Yecheng Ding, Xubing Lu, Zhibo Yan, Jun-Ming Liu, Guoliang Yuan
Hf0.5Zr0.5O2 (HZO) thin films are promising for applications in ferroelectric memories. However, these materials often face challenges, such as polarization fluctuations (e.g., fatigue and wake-up) and electric break-down incidents during the “1/0” write/read cycles, hindering their industrial application. Herein, fatigue, wake-up, and electric break-down seriously depend on both the electric field