scholarly journals Quantum Spin Hall Effect in Silicene and Two-Dimensional Germanium

2011 ◽  
Vol 107 (7) ◽  
Author(s):  
Cheng-Cheng Liu ◽  
Wanxiang Feng ◽  
Yugui Yao
2016 ◽  
Vol 49 (5) ◽  
pp. 055305 ◽  
Author(s):  
Ya-ping Wang ◽  
Chang-wen Zhang ◽  
Wei-xiao Ji ◽  
Run-wu Zhang ◽  
Ping Li ◽  
...  

Science ◽  
2018 ◽  
Vol 359 (6371) ◽  
pp. 76-79 ◽  
Author(s):  
Sanfeng Wu ◽  
Valla Fatemi ◽  
Quinn D. Gibson ◽  
Kenji Watanabe ◽  
Takashi Taniguchi ◽  
...  

A variety of monolayer crystals have been proposed to be two-dimensional topological insulators exhibiting the quantum spin Hall effect (QSHE), possibly even at high temperatures. Here we report the observation of the QSHE in monolayer tungsten ditelluride (WTe2) at temperatures up to 100 kelvin. In the short-edge limit, the monolayer exhibits the hallmark transport conductance, ~e2/h per edge, where e is the electron charge and h is Planck’s constant. Moreover, a magnetic field suppresses the conductance, and the observed Zeeman-type gap indicates the existence of a Kramers degenerate point and the importance of time-reversal symmetry for protection from elastic backscattering. Our results establish the QSHE at temperatures much higher than in semiconductor heterostructures and allow for exploring topological phases in atomically thin crystals.


2018 ◽  
Vol 20 (14) ◽  
pp. 9610-9615
Author(s):  
Miaojuan Ren ◽  
Min Yuan ◽  
Xinlian Chen ◽  
Weixiao Ji ◽  
Ping Li ◽  
...  

Using first-principles calculations, we studied the geometric and band structures of 20 possible configurations of buckled hydrogenated SnPb alloy (SnxPb8−xH8) films.


2014 ◽  
Vol 104 (3) ◽  
pp. 032410 ◽  
Author(s):  
Gaurav Gupta ◽  
Hsin Lin ◽  
Arun Bansil ◽  
Mansoor Bin Abdul Jalil ◽  
Cheng-Yi Huang ◽  
...  

2018 ◽  
Vol 35 (8) ◽  
pp. 087303 ◽  
Author(s):  
Shou-juan Zhang ◽  
Wei-xiao Ji ◽  
Chang-wen Zhang ◽  
Shu-feng Zhang ◽  
Ping Li ◽  
...  

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