中国物理B ›› 2019, Vol. 28 ›› Issue (10): 100304-100304.doi: 10.1088/1674-1056/ab3f94
• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇 下一篇
J S Liu(刘建森), Y Z Han(韩炎桢), C S Liu(刘承师)
收稿日期:
2019-06-21
修回日期:
2019-08-08
出版日期:
2019-10-05
发布日期:
2019-10-05
通讯作者:
C S Liu
E-mail:csliu@ysu.edu.cn
基金资助:
J S Liu(刘建森), Y Z Han(韩炎桢), C S Liu(刘承师)
Received:
2019-06-21
Revised:
2019-08-08
Online:
2019-10-05
Published:
2019-10-05
Contact:
C S Liu
E-mail:csliu@ysu.edu.cn
Supported by:
摘要: We study topological phases of a non-Hermitian coupled Su-Schrieffer-Heeger (SSH) ladder. The model originates from the brick-wall lattices in the two-row limit. The Hamiltonian can be brought into block off-diagonal form and the winding number can be defined with the determine of the block off-diagonal matrix. We find the determine of the off-diagonal matrix has nothing to do with the interleg hopping of the ladder. So the topological phases of the model are the same as those of the chains. Further numerical simulations verify the analysis.
中图分类号: (Phases: geometric; dynamic or topological)
刘建森, 韩炎桢, 刘承师. Topological phases of a non-Hermitian coupled SSH ladder[J]. 中国物理B, 2019, 28(10): 100304-100304.
J S Liu(刘建森), Y Z Han(韩炎桢), C S Liu(刘承师). Topological phases of a non-Hermitian coupled SSH ladder[J]. Chin. Phys. B, 2019, 28(10): 100304-100304.
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