scholarly journals Two-dimensional time-reversal-invariant topological superconductivity in a doped quantum spin-Hall insulator

2014 ◽  
Vol 90 (5) ◽  
Author(s):  
Jing Wang ◽  
Yong Xu ◽  
Shou-Cheng Zhang
Keyword(s):  
Time Reversal ◽  
Quantum Spin ◽  
Two Dimensional ◽  
Topological Superconductivity ◽  
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.

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

scholarly journals Voltage-tunable Majorana bound states in time-reversal symmetric bilayer quantum spin Hall hybrid systems

2019 ◽  
Vol 100 (16) ◽  
Author(s):  
F. Schulz ◽  
J. C. Budich ◽  
E. G. Novik ◽  
P. Recher ◽  
B. Trauzettel
Keyword(s):  
Hybrid Systems ◽  
Time Reversal ◽  
Bound States ◽  
Quantum Spin ◽  
Majorana Bound States ◽  
Quantum Spin Hall

Quantum spin Hall state in cyanided dumbbell stanene

RSC Advances ◽  
2016 ◽  
Vol 6 (89) ◽  
pp. 86089-86094 ◽  
Author(s):  
Min Yuan ◽  
Wei-xiao Ji ◽  
Miao-juan Ren ◽  
Ya-ping Wang ◽  
Hui Zhao
Keyword(s):  
High Temperature ◽  
Hall Effect ◽  
Band Gap ◽  
Condensed Matter ◽  
Quantum Spin ◽  
Condensed Matter Physics ◽  
Two Dimensional ◽  
Important Goal ◽  
Quantum Spin Hall Effect ◽  
Quantum Spin Hall

Searching for two-dimensional (2D) quantum spin Hall (QSH) insulators with a large band gap, in which the Quantum spin Hall effect (QSHE) can be observed at high temperature, is an important goal for condensed matter physics researchers.

scholarly journals Two-dimensional arsenene oxide: A realistic large-gap quantum spin Hall insulator

2017 ◽  
Vol 110 (21) ◽  
pp. 213101 ◽  
Author(s):  
Ya-ping Wang ◽  
Wei-xiao Ji ◽  
Chang-wen Zhang ◽  
Ping Li ◽  
Shu-feng Zhang ◽  
...  
Keyword(s):  
Quantum Spin ◽  
Two Dimensional ◽  
Quantum Spin Hall

New topological states in HgTe quantum wells from defect patterning

Nanoscale ◽  
2018 ◽  
Vol 10 (33) ◽  
pp. 15462-15467
Author(s):  
Hua-Hua Fu ◽  
Ruqian Wu
Keyword(s):  
Quantum Wells ◽  
2D Materials ◽  
Quantum Spin ◽  
Two Dimensional ◽  
New Methods ◽  
Topological States ◽  
Quantum Spin Hall

To explore new methods for the realization of the quantum spin Hall (QSH) effect in two-dimensional (2D) materials, we have constructed a honeycomb geometry (HG) by etching rows of hexagonal holes in HgTe quantum wells (QWs).

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