Nature of continuous phase transitions in interacting topological insulators

被引：7
|
作者：
Zeng, Tian-Sheng [1 ]
Zhu, W. [2 ,3 ]
Zhu, Jian-Xin [2 ,3 ,4 ]
Sheng, D. N. [1 ]
机构：
[1] Calif State Univ Northridge, Dept Phys & Astron, Northridge, CA 91330 USA
[2] Los Alamos Natl Lab, Theoret Div, T4, Los Alamos, NM 87545 USA
[3] Los Alamos Natl Lab, CNLS, Los Alamos, NM 87545 USA
[4] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA
来源：
PHYSICAL REVIEW B | 2017年 / 96卷 / 19期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1103/PhysRevB.96.195118
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We revisit the effects of the Hubbard repulsion on quantum spin Hall effects (QSHE) in two-dimensional quantum lattice models. We present both unbiased exact diagonalization and density-matrix renormalization group simulations with numerical evidence for a continuous quantum phase transition (CQPT) separating QSHE from the topologically trivial antiferromagnetic phase. Our numerical results suggest that the nature of CQPT exhibits distinct finite-size scaling behaviors, which may be consistent with either Ising or XY universality classes for different time-reversal symmetric QSHE systems.
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页数：7
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