标题： 磁振子诱导的拓扑相 显示英文标题

标题： Magnon-induced topological phases

摘要： 拓扑电子态，如拓扑绝缘体和量子霍尔态，通常需要强自旋-轨道耦合或磁场。 在本研究中，我们考虑一个与自旋系统耦合的电子系统，其中电子与磁振子（自旋波的准粒子）相互作用。 我们表明，电子与磁振子之间的相互作用将自旋系统中的对称性破缺效应传递到电子系统中，从而在原本拓扑平凡的电子系统中诱导出非平凡的拓扑相。 通过这种“拓扑传递”机制，我们在简单的铁磁自旋系统中实现了各种拓扑相，包括量子霍尔和量子自旋霍尔绝缘体，而无需电子系统具备强自旋-轨道耦合或磁场。 显示英文摘要

摘要： Topological electronic states such as topological insulators and quantum Hall states typically require strong spin-orbit coupling or magnetic fields. In this study, we consider an electron system coupled to a spin system, where electrons interact with magnons, quasiparticles of spin waves. We show that the interaction between electrons and magnons transfers the effect of symmetry breaking in the spin system to the electron system, whereby a non-trivial topological phase can be induced in the electron system that is otherwise topologically trivial. Through this ``topology transfer'' mechanism, we demonstrate the realization of various topological phases, including quantum Hall and quantum spin Hall insulators, in simple ferromagnetic spin systems, without requiring strong spin-orbit coupling or magnetic field for electron systems.