Critical Exponent for the Quantum Spin Hall Transition in Z 2 Network Model
Critical Exponent for the Quantum Spin Hall Transition in Z 2 Network Model
复制标题
Z 2 网络模型中量子自旋霍尔跃迁的临界指数
DOI:
10.1142/9789814436861_0013
复制
发表时间:
2013
期刊:
影响因子:
--
通讯作者:
K. Slevin
中科院分区:
文献类型:
--
作者:
Koji M. Kobayashi;T. Ohtsuki;K. Slevin
We have estimated the critical exponent describing the divergence of the localization length at the metal-quantum spin Hall insulator transition. The critical exponent for the metal-ordinary insulator transition in quantum spin Hall systems is known to be consistent with that of topologically trivial symplectic systems. However, the precise estimation of the critical exponent for the metal-quantum spin Hall insulator transition proved to be problematic because of the existence, in this case, of edge states in the localized phase. We have overcome this difficulty by analyzing the second smallest positive Lyapunov exponent instead of the smallest positive Lyapunov exponent. We find a value for the critical exponent ν = 2.73 ± 0.02 that is consistent with that for topologically trivial symplectic systems.
影响因子:
3.7
作者:
Y. Asada;K. Slevin;T. Ohtsuki
通讯作者:
Y. Asada;K. Slevin;T. Ohtsuki
影响因子:
8.6
作者:
M. Onoda;Y. Avishai;N. Nagaosa
通讯作者:
M. Onoda;Y. Avishai;N. Nagaosa