Nonlinear spin torque nano-oscillators have received substantial attentions due to their important applications in microwave communication and neuromorphic computing. Here we investigate the dynamical behaviors of directly coupled skyrmion oscillators in a synthetic ferrimagnet. We demonstrate through the micromagnetic simulation and Thiele’s equation that the skyrmion oscillators can present either synchronization or frequency comb, depending on the strength of interactions between the skyrmions. The underlying physics of the transition between the two scenarios are unveiled based on a quantitative analysis of the effective potentials, which also successfully interprets the dependence of the transition on parameters. By further demonstrating the tunability of the nonlinear dynamics by the driving current of the oscillators, our work reveals the great potentials of ferrimagnetic-skyrmion-based interacting oscillators for nonlinear applications.

非线性自旋矩纳米振荡器由于其在微波通信和神经形态计算中的重要应用而受到广泛关注。在这里，我们研究了合成亚铁磁体中直接耦合斯格明子振荡器的动力学行为。我们通过微磁模拟和蒂勒方程证明，斯格明子振荡器可以呈现同步或频率梳，具体取决于斯格明子之间相互作用的强度。基于有效势的定量分析揭示了两种情景之间转变的基本物理原理，这也成功地解释了转变对参数的依赖性。通过进一步证明振荡器驱动电流对非线性动力学的可调性，我们的工作揭示了基于亚铁磁-斯格明子的相互作用振荡器在非线性应用中的巨大潜力。