Discovery of Two-Dimensional Quantum Spin Hall Effect in Triangular Transition-Metal Carbides

2018 ◽  
Vol 35 (8) ◽  
pp. 087303 ◽  
Author(s):  
Shou-juan Zhang ◽  
Wei-xiao Ji ◽  
Chang-wen Zhang ◽  
Shu-feng Zhang ◽  
Ping Li ◽  
...  
Keyword(s):  
Transition Metal ◽  
Hall Effect ◽  
Quantum Spin ◽  
Spin Hall Effect ◽  
Two Dimensional ◽  
Metal Carbides ◽  
Quantum Spin Hall Effect ◽  
Transition Metal Carbides ◽  
Quantum Spin Hall

Prediction of the quantum spin Hall effect in monolayers of transition-metal carbides MC (M = Ti, Zr, Hf)

2D Materials ◽  
2016 ◽  
Vol 3 (3) ◽  
pp. 035022 ◽  
Author(s):  
Liujiang Zhou ◽  
Bin Shao ◽  
Wujun Shi ◽  
Yan Sun ◽  
Claudia Felser ◽  
...  
Keyword(s):  
Transition Metal ◽  
Hall Effect ◽  
Quantum Spin ◽  
Spin Hall Effect ◽  
Metal Carbides ◽  
Quantum Spin Hall Effect ◽  
Transition Metal Carbides ◽  
Quantum Spin Hall

Two-dimensional stable transition metal carbides (MnC and NbC) with prediction and novel functionalizations

2018 ◽  
Vol 20 (39) ◽  
pp. 25437-25445 ◽  
Author(s):  
Bingwen Zhang ◽  
Yina Huang ◽  
Weicheng Bao ◽  
Baolin Wang ◽  
Qiangqiang Meng ◽  
...  
Keyword(s):  
Transition Metal ◽  
Hall Effect ◽  
Quantum Spin ◽  
Two Dimensional ◽  
Li Ion Battery ◽  
Metal Carbides ◽  
Half Metallic ◽  
Quantum Spin Hall Effect ◽  
Transition Metal Carbides ◽  
Li Ion

MnC and NbC monolayers are predicted to be stable and promising for Li-ion battery, by functionalization, they exhibit half-metallic property and quantum spin Hall effect, respectively.

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

Quantum Spin Hall Effect in a Transition Metal OxideNa2IrO3

2009 ◽  
Vol 102 (25) ◽  
Author(s):  
Atsuo Shitade ◽  
Hosho Katsura ◽  
Jan Kuneš ◽  
Xiao-Liang Qi ◽  
Shou-Cheng Zhang ◽  
...  
Keyword(s):  
Transition Metal ◽  
Hall Effect ◽  
Quantum Spin ◽  
Spin Hall Effect ◽  
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.

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