First-principles prediction of a giant-gap quantum spin Hall insulator in Pb thin film

2016 ◽  
Vol 18 (46) ◽  
pp. 31862-31868 ◽  
Author(s):  
Hui Zhao ◽  
Wei-xiao Ji ◽  
Chang-wen Zhang ◽  
Ping Li ◽  
Feng Li ◽  
...  
Keyword(s):  
Thin Film ◽  
First Principles ◽  
Quantum Spin ◽  
Quantum Spin Hall

Gate-tunable superconductivity and charge-density wave in monolayer 1T$'$-MoTe$_2$ and 1T$'$-WTe$_2$

2021 ◽  
Author(s):  
Young-Woo Son ◽  
Jun-Ho Lee
Keyword(s):  
Phase Transitions ◽  
Charge Density ◽  
First Principles ◽  
Charge Density Wave ◽  
Density Wave ◽  
Quantum Spin ◽  
First Principles Calculation ◽  
Calculation Methods ◽  
Electron Doping ◽  
Quantum Spin Hall

Using first-principles calculation methods, we reveal a series of phase transitions as a function of gating or electron doping in monolayered quantum spin Hall (QSH) insulators, 1T$'$-MoTe$_2$ and 1T$'$-WTe$_2$. As...

scholarly journals Large bandgap quantum spin Hall insulator in methyl decorated plumbene monolayer: a first-principles study

RSC Advances ◽  
2019 ◽  
Vol 9 (72) ◽  
pp. 42194-42203 ◽  
Author(s):  
Shoaib Mahmud ◽  
Md. Kawsar Alam
Keyword(s):  
First Principles ◽  
Quantum Spin ◽  
First Principles Study ◽  
Quantum Spin Hall

Formulating methyl and trihalogenomethyl decorated plumbene monolayers as quantum spin Hall insulators for application in spintronic and dissipationless transport.

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 Strain induced quantum spin Hall insulator in monolayer β-BiSb from first-principles study

RSC Advances ◽  
2017 ◽  
Vol 7 (44) ◽  
pp. 27816-27822 ◽  
Author(s):  
Weiyang Yu ◽  
Chun-Yao Niu ◽  
Zhili Zhu ◽  
Xiaolin Cai ◽  
Liwei Zhang ◽  
...  
Keyword(s):  
Transport Properties ◽  
Quantum Transport ◽  
Topological Insulator ◽  
First Principles ◽  
Electronic Devices ◽  
Quantum Spin ◽  
Lower Power ◽  
First Principles Study ◽  
Potential Applications ◽  
Quantum Spin Hall

Topological insulator (TI) is a peculiar phase of matter exhibiting excellent quantum transport properties with potential applications in lower-power-consuming electronic devices.

scholarly journals Confinement Effect Driven Quantum Spin Hall Effect in Monolayer AuTe2Cl

SPIN ◽  
2019 ◽  
Vol 09 (04) ◽  
pp. 1940014
Author(s):  
Guyue Zhong ◽  
Q. Xie ◽  
Gang Xu
Keyword(s):  
First Principles ◽  
Three Dimensional ◽  
Bulk Sample ◽  
Quantum Spin ◽  
Confinement Effect ◽  
First Principles Calculations ◽  
Quantum Spin Hall Effect ◽  
Band Inversion ◽  
Topological Semimetal ◽  
Quantum Spin Hall

Based on first-principles calculations, we predict that the monolayer AuTe2Cl is a quantum spin Hall (QSH) insulator with a topological band gap about 10 meV. The three-dimensional (3D) AuTe2Cl is a topological semimetal that can be viewed as the monolayer stacking along [Formula: see text] axis. By studying the energy-level distribution of [Formula: see text] orbitals of Te atoms for the bulk and the monolayer, we find that the confinement effect driven [Formula: see text] band inversion is responsible for the topological nontrivial nature of monolayer. Since 3D bulk AuTe2Cl has already been experimentally synthesized, we expect that monolayer AuTe2Cl can be exfoliated from a bulk sample and the predicted QSH effect can be observed.

First-principles prediction on bismuthylene monolayer as a promising quantum spin Hall insulator

Nanoscale ◽  
2017 ◽  
Vol 9 (24) ◽  
pp. 8207-8212 ◽  
Author(s):  
Run-Wu Zhang ◽  
Chang-Wen Zhang ◽  
Wei-Xiao Ji ◽  
Shi-Shen Yan ◽  
Yu-Gui Yao
Keyword(s):  
Electric Fields ◽  
Topological Insulator ◽  
First Principles ◽  
Quantum Spin ◽  
Topological Properties ◽  
Quantum Spin Hall

We predict a stable new 2D large gap topological insulator in the porous allotrope of bismuth monolayer, i.e. bismuthylene. Its topological properties can be reserved under strains and electric fields.

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.

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