Floquet Chiral Magnetic Effect
Floquet Chiral Magnetic Effect
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DOI：
10.1103/physrevlett.123.066403
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发表时间：
2019-08-07
影响因子：
8.6
通讯作者：
Ueda, Masahito
中科院分区：
文献类型：
--
作者：
Higashikawa, Sho;Nakagawa, Masaya;Ueda, Masahito
在周期性驱动的三维晶格系统中，利用拓扑非平凡Floquet酉算子实现了静态晶格系统中被Nielsen-Ninomiya定理所禁止的单个Weyl费米子，并表现出手性磁效应。我们给出了所有维度的Altland-Zirnbauer对称类中的Floquet酉算子的拓扑分类，并利用它预测了拓扑绝缘体和超导体的所有无间隙表面态都可以出现在Floquet系统的体准能谱中。
A single Weyl fermion, which is prohibited in static lattice systems by the Nielsen-Ninomiya theorem, is shown to be realized in a periodically driven three-dimensional lattice system with a topologically nontrivial Floquet unitary operator, manifesting the chiral magnetic effect. We give a topological classification of Floquet unitary operators in the Altland-Zirnbauer symmetry classes for all dimensions, and use it to predict that all gapless surface states of topological insulators and superconductors can emerge in bulk quasienergy spectra of Floquet systems.