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).

Piezoelectric quantum spin Hall insulator with Rashba spin splitting in Janus monolayer SrAlGaSe4

2021 ◽  
Author(s):  
San-Dong Guo ◽  
Yu-Tong Zhu ◽  
Wen-Qi Mu ◽  
Xingqiu Chen
Keyword(s):  
2D Materials ◽  
Quantum Spin ◽  
Spin Splitting ◽  
Two Dimensional ◽  
Rashba Spin ◽  
Rashba Spin Splitting ◽  
Insulating Phase ◽  
Quantum Spin Hall

The realization of multifunctional two-dimensional (2D) materials is fundamentally intriguing, such as combination of piezoelectricity with topological insulating phase or ferromagnetism. In this work, a Janus monolayer $\mathrm{SrAlGaSe_4}$ is built...

scholarly journals Room temperature quantum spin Hall states in two-dimensional crystals composed of pentagonal rings and their quantum wells

2016 ◽  
Vol 8 (4) ◽  
pp. e264-e264 ◽  
Author(s):  
Yandong Ma ◽  
Liangzhi Kou ◽  
Xiao Li ◽  
Ying Dai ◽  
Thomas Heine
Keyword(s):  
Quantum Wells ◽  
Room Temperature ◽  
Quantum Spin ◽  
Two Dimensional ◽  
Hall States ◽  
Quantum Spin Hall

scholarly journals Emergent quantum Hall effects below 50 mT in a two-dimensional topological insulator

2020 ◽  
Vol 6 (26) ◽  
pp. eaba4625
Author(s):  
Saquib Shamim ◽  
Wouter Beugeling ◽  
Jan Böttcher ◽  
Pragya Shekhar ◽  
Andreas Budewitz ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Quantum Hall ◽  
Quantum Spin ◽  
Majorana Fermions ◽  
Quantum Spin Hall Effect ◽  
Topological Materials ◽  
Quantum Hall Effects ◽  
Hall Effects ◽  
Low Magnetic Field ◽  
Quantum Spin Hall

The realization of the quantum spin Hall effect in HgTe quantum wells has led to the development of topological materials, which, in combination with magnetism and superconductivity, are predicted to host chiral Majorana fermions. However, the large magnetization in conventional quantum anomalous Hall systems makes it challenging to induce superconductivity. Here, we report two different emergent quantum Hall effects in (Hg,Mn)Te quantum wells. First, a previously unidentified quantum Hall state emerges from the quantum spin Hall state at an exceptionally low magnetic field of ~50 mT. Second, tuning toward the bulk p-regime, we resolve quantum Hall plateaus at fields as low as 20 to 30 mT, where transport is dominated by a van Hove singularity in the valence band. These emergent quantum Hall phenomena rely critically on the topological band structure of HgTe, and their occurrence at very low fields makes them an ideal candidate for realizing chiral Majorana fermions.

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 Quantum Spin Hall Insulator State in HgTe Quantum Wells

Science ◽  
2007 ◽  
Vol 318 (5851) ◽  
pp. 766-770 ◽  
Author(s):  
M. Konig ◽  
S. Wiedmann ◽  
C. Brune ◽  
A. Roth ◽  
H. Buhmann ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Quantum Spin ◽  
Quantum Spin Hall

scholarly journals Robust helical edge transport in quantum spin Hall quantum wells

2018 ◽  
Vol 98 (20) ◽  
Author(s):  
Rafal Skolasinski ◽  
Dmitry I. Pikulin ◽  
Jason Alicea ◽  
Michael Wimmer
Keyword(s):  
Quantum Wells ◽  
Quantum Spin ◽  
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.

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