Bulk-edge correspondence with generalized chiral symmetry
Bulk-edge correspondence with generalized chiral symmetry
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DOI：
10.1103/physrevb.103.205306
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发表时间：
2020-11
期刊：
影响因子：
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通讯作者：
T. Kawarabayashi;Y. Hatsugai
中科院分区：
文献类型：
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作者：
T. Kawarabayashi;Y. Hatsugai
将拓扑相中的体-边对应推广到具有广义手征对称性的系统，其中传统的手征对称性被破缺。在这样的系统中，我们发现，边缘状态的对称性破缺的质量，这是明确的情况下，变形的Su-Schrieffer-Heeger模型中探索的存在下，表现出非常规的行为。边缘态的局域化长度在一定的临界质量处发散，在此边缘态与体能带接触。边缘状态由在接触能量处变为真实的的虚波矢量指定。
The bulk-edge correspondence in topological phases is extended to systems with the generalized chiral symmetry, where the conventional chiral symmetry is broken. In such systems, we find that the edge state exhibits an unconventional behavior in the presence of the symmetry breaking by the mass, which is explored explicitly in the case of a deformed Su-Schrieffer-Heeger model. The localization length of the edge states diverges at a certain critical mass, where the edge state touches to the bulk band. The edge state is specified by an imaginary wave vector that becomes real at the touching energy.