Construction of diatomic rotors, which is crucial for artificial nanomachines, remains challenging due to surface constraints and limited chemical design. Here we report the construction of diatomic Cr–Cs and Fe–Cs rotors where a Cr or Fe atom switches around a Cs atom at the Sb surface of the newly discovered kagome superconductor CsV₃Sb₅. The switching rate is controlled by the bias voltage between the rotor and scanning tunneling microscope (STM) tip. The spatial distribution of rates exhibits C₂ symmetry, possibly linked to the symmetry-breaking charge orders of CsV₃Sb₅. We have expanded the rotor construction to include different transition metals (Cr, Fe, V) and alkali metals (Cs, K). Remarkably, designed configurations of rotors are achieved through STM manipulation. Rotor orbits and quantum states are precisely controlled by tuning the inter-rotor distance. Our findings establish a novel platform for the controlled fabrication of atomic motors on symmetry-breaking quantum materials, paving the way for advanced nanoscale devices.

中文翻译：

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Kagome 超导体对称破缺表面双原子转子的形成和操纵


由于表面限制和有限的化学设计，双原子转子的构造对于人造纳米机器至关重要，但仍然具有挑战性。在这里，我们报告了双原子 Cr-Cs 和 Fe-Cs 转子的结构，其中 Cr 或 Fe 原子在新发现的 kagome 超导体 CsV ₃ Sb ₅ 对称性，可能与 CsV ₃ Sb ₅ 的对称破缺电荷级有关。我们扩展了转子结构，包括不同的过渡金属（Cr、Fe、V）和碱金属（Cs、K）。值得注意的是，转子的设计配置是通过 STM 操作实现的。通过调整转子间的距离来精确控制转子轨道和量子态。我们的研究结果建立了一个新颖的平台，用于在对称破缺的量子材料上控制制造原子发动机，为先进的纳米级设备铺平了道路。