Topological properties of the bond-modulated honeycomb lattice

被引：18
作者：
Grandi, F. [1 ,2 ]
Manghi, F. [1 ,3 ]
Corradini, O. [1 ,4 ]
Bertoni, C. M. [1 ,3 ]
机构：
[1] Univ Modena & Reggio Emilia, Dipartimento Sci Fis Informat & Matemat, I-41125 Modena, Italy
[2] SISSA, I-34136 Trieste, Italy
[3] CNR, Ist Nanosci, Ctr S3, I-41125 Modena, Italy
[4] Univ Autonoma Chiapas, Fac Ciencias Fis & Matemat, Tuxtla Gutierrez 29050, Mexico
来源：
PHYSICAL REVIEW B | 2015年 / 91卷 / 11期
关键词：
MODEL;
D O I：
10.1103/PhysRevB.91.115112
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We study the combined effects of lattice deformation, e-e interaction, and spin-orbit coupling in a two-dimensional (2D) honeycomb lattice. We adopt different kinds of hopping modulation-generalized dimerization and a Kekule distortion-and calculate topological invariants for the noninteracting system and for the interacting system. We identify the parameter range (Hubbard U, hopping modulation, spin-orbit coupling) where the 2D system behaves as a trivial insulator or quantum spin Hall insulator.
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页数：7
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