On the Quantum Spin Hall Gap of Monolayer 1T'-WTe2.
Positive quantum spin Hall gap in mono-layer 1T'-WTe2 is consistently supported by density-functional theory calculations, ultrafast pump-probe, and electrical transport measurements. It is argued that monolayer 1T'-WTe2 , which was predicted to be a semimetallic quantum spin Hall material, is likely a truly 2D quantum spin Hall insulator with a positive quantum spin Hall gap.
International Center for Quantum Materials, School of Physics, Peking University, Beijing, 100871, P. R. China.|Collaborative Center for Materials Innovation, Beijing, 100871, P. R. China.
Feipeng
F
Zheng
International Center for Quantum Materials, School of Physics, Peking University, Beijing, 100871, P. R. China.|Collaborative Center for Materials Innovation, Beijing, 100871, P. R. China.
Chaoyi
C
Cai
International Center for Quantum Materials, School of Physics, Peking University, Beijing, 100871, P. R. China.|Collaborative Center for Materials Innovation, Beijing, 100871, P. R. China.
Shaofeng
S
Ge
School of Physics and Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China.
Xuefeng
X
Zhang
International Center for Quantum Materials, School of Physics, Peking University, Beijing, 100871, P. R. China.|Collaborative Center for Materials Innovation, Beijing, 100871, P. R. China.
Xin
X
Liu
International Center for Quantum Materials, School of Physics, Peking University, Beijing, 100871, P. R. China.|Collaborative Center for Materials Innovation, Beijing, 100871, P. R. China.
Hong
H
Lu
International Center for Quantum Materials, School of Physics, Peking University, Beijing, 100871, P. R. China.|Collaborative Center for Materials Innovation, Beijing, 100871, P. R. China.
Yudao
Y
Zhang
International Center for Quantum Materials, School of Physics, Peking University, Beijing, 100871, P. R. China.|Collaborative Center for Materials Innovation, Beijing, 100871, P. R. China.
Jun
J
Qiu
High Pressure Group, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan.
Takashi
T
Taniguchi
High Pressure Group, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan.
Kenji
K
Watanabe
International Center for Quantum Materials, School of Physics, Peking University, Beijing, 100871, P. R. China.|Collaborative Center for Materials Innovation, Beijing, 100871, P. R. China.
Shuang
S
Jia
School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou, 221116, P. R. China.
Jingshan
J
Qi
International Center for Quantum Materials, School of Physics, Peking University, Beijing, 100871, P. R. China.|Collaborative Center for Materials Innovation, Beijing, 100871, P. R. China.
Jian-Hao
JH
Chen
International Center for Quantum Materials, School of Physics, Peking University, Beijing, 100871, P. R. China.|Collaborative Center for Materials Innovation, Beijing, 100871, P. R. China.
Dong
D
Sun
International Center for Quantum Materials, School of Physics, Peking University, Beijing, 100871, P. R. China.|Collaborative Center for Materials Innovation, Beijing, 100871, P. R. China.
Ji
J
Feng
Schottcky junctions; density functional theory; quantum spin Hall effect; ultra-fast spectroscopy