Quantum spin Hall effect in two-dimensional hydrogenated SnPb alloy films

2018 ◽  
Vol 20 (14) ◽  
pp. 9610-9615
Author(s):  
Miaojuan Ren ◽  
Min Yuan ◽  
Xinlian Chen ◽  
Weixiao Ji ◽  
Ping Li ◽  
...  
Keyword(s):  
Hall Effect ◽  
First Principles ◽  
Quantum Spin ◽  
Spin Hall Effect ◽  
Two Dimensional ◽  
First Principles Calculations ◽  
Band Structures ◽  
Alloy Films ◽  
Quantum Spin Hall Effect ◽  
Quantum Spin Hall

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

Prediction of flatness-driven quantum spin Hall effect in functionalized germanene and stanene

2016 ◽  
Vol 18 (40) ◽  
pp. 28134-28139 ◽  
Author(s):  
Run-wu Zhang ◽  
Wei-xiao Ji ◽  
Chang-wen Zhang ◽  
Ping Li ◽  
Pei-ji Wang
Keyword(s):  
Hall Effect ◽  
First Principles ◽  
Quantum Spin ◽  
Spin Hall Effect ◽  
First Principles Calculations ◽  
Quantum Spin Hall Effect ◽  
Chemical Functionalization ◽  
Quantum Spin Hall

We used first-principles calculations to predict a class of new QSH phases for f-Ge(Sn)X2 films, which are useful for applications because of not only their sizable nontrivial bulk gaps, but also the tunability of the QSH states by chemical functionalization.

scholarly journals Tunable quantum spin Hall effect via strain in two-dimensional arsenene monolayer

2016 ◽  
Vol 49 (5) ◽  
pp. 055305 ◽  
Author(s):  
Ya-ping Wang ◽  
Chang-wen Zhang ◽  
Wei-xiao Ji ◽  
Run-wu Zhang ◽  
Ping Li ◽  
...  
Keyword(s):  
Hall Effect ◽  
Quantum Spin ◽  
Spin Hall Effect ◽  
Two Dimensional ◽  
Quantum Spin Hall Effect ◽  
Quantum Spin Hall

Predicting quantum spin hall effect in graphene/GaSb and normal strain-controlled band structures

2020 ◽  
Vol 526 ◽  
pp. 146704
Author(s):  
Xinxin Wang ◽  
Naifeng Shen ◽  
Jun Wu ◽  
Baolin Wang ◽  
Jianguo Wan
Keyword(s):  
Hall Effect ◽  
Quantum Spin ◽  
Spin Hall Effect ◽  
Normal Strain ◽  
Band Structures ◽  
Quantum Spin Hall Effect ◽  
Quantum Spin Hall

scholarly journals Observation of the quantum spin Hall effect up to 100 kelvin in a monolayer crystal

Science ◽  
2018 ◽  
Vol 359 (6371) ◽  
pp. 76-79 ◽  
Author(s):  
Sanfeng Wu ◽  
Valla Fatemi ◽  
Quinn D. Gibson ◽  
Kenji Watanabe ◽  
Takashi Taniguchi ◽  
...  
Keyword(s):  
Hall Effect ◽  
Time Reversal ◽  
Quantum Spin ◽  
Spin Hall Effect ◽  
Semiconductor Heterostructures ◽  
Topological Phases ◽  
Two Dimensional ◽  
Quantum Spin Hall Effect ◽  
Elastic Backscattering ◽  
Quantum Spin Hall

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.

Y-shape spin-separator for two-dimensional group-IV nanoribbons based on quantum spin hall effect

2014 ◽  
Vol 104 (3) ◽  
pp. 032410 ◽  
Author(s):  
Gaurav Gupta ◽  
Hsin Lin ◽  
Arun Bansil ◽  
Mansoor Bin Abdul Jalil ◽  
Cheng-Yi Huang ◽  
...  
Keyword(s):  
Hall Effect ◽  
Quantum Spin ◽  
Group Iv ◽  
Spin Hall Effect ◽  
Two Dimensional ◽  
Quantum Spin Hall Effect ◽  
Dimensional Group ◽  
Quantum Spin Hall
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