论文标题
浮雕拓扑系统的轨道磁化
Orbital magnetization of Floquet topological systems
论文作者
论文摘要
得出了浮雕系统轨道磁化的一般表达。该表达式适用于干净的系统，对于任何驾驶协议和对频段的任意职业都是有效的。轨道磁化强度不仅对Chern绝缘子也很大，而且对于Chern数量无法完全解释拓扑的异常阶段。此外，轨道磁化强度显示出对浮子带的热平衡占用的重要值，以及由从零轨道磁化的初始状态量子淬灭确定的职业。对于后一种情况，轨道磁化强度对浮雕带的范霍夫奇异性高度敏感。
A general expression for the orbital magnetization of a Floquet system is derived. The expression holds for a clean system, and is valid for any driving protocol, and arbitrary occupation of the bands. The orbital magnetization is shown to be large not only for Chern insulators, but also for anomalous phases where the Chern number does not fully account for the topology. In addition, the orbital magnetization is shown to take significant values both for a thermal equilibrium occupation of the Floquet bands, and for occupations determined by a quantum quench from an initial state with zero orbital magnetization. For the latter case, the orbital magnetization is shown to be highly sensitive to van Hove singularities of the Floquet bands.
