Hydrogenation-induced large-gap quantum-spin-Hall insulator states in a germanium–tin dumbbell structure

RSC Advances ◽  
2015 ◽  
Vol 5 (89) ◽  
pp. 72462-72468 ◽  
Author(s):  
Xin Chen ◽  
Linyang Li ◽  
Mingwen Zhao
Keyword(s):  
Quantum Spin ◽  
Band Gaps ◽  
Germanium Tin ◽  
Dumbbell Structure ◽  
Quantum Spin Hall

The germanium–tin dumbbell structure, Sn6Ge4H4 has large topological nontrivial band gaps.

New family of room temperature quantum spin Hall insulators in two-dimensional germanene films

2016 ◽  
Vol 4 (10) ◽  
pp. 2088-2094 ◽  
Author(s):  
Run-wu Zhang ◽  
Wei-xiao Ji ◽  
Chang-wen Zhang ◽  
Sheng-shi Li ◽  
Ping Li ◽  
...  
Keyword(s):  
First Principles ◽  
Topological Insulators ◽  
Room Temperature ◽  
Quantum Spin ◽  
Band Gaps ◽  
Two Dimensional ◽  
First Principles Calculations ◽  
New Family ◽  
Temperature Applications ◽  
Quantum Spin Hall

Based on first-principles calculations, we predict that 2D germanene decorated with ethynyl-derivatives (GeC2X; X = H, F, Cl, Br, I) can be topological insulators with large band-gaps for room-temperature applications.

scholarly journals New Family of Quantum Spin Hall Insulators in Two-dimensional Transition-Metal Halide with Large Nontrivial Band Gaps

Nano Letters ◽  
2015 ◽  
Vol 15 (12) ◽  
pp. 7867-7872 ◽  
Author(s):  
Liujiang Zhou ◽  
Liangzhi Kou ◽  
Yan Sun ◽  
Claudia Felser ◽  
Feiming Hu ◽  
...  
Keyword(s):  
Transition Metal ◽  
Quantum Spin ◽  
Metal Halide ◽  
Band Gaps ◽  
Two Dimensional ◽  
New Family ◽  
Quantum Spin Hall

Families of asymmetrically functionalized germanene films as promising quantum spin Hall insulators

2021 ◽  
Vol 23 (5) ◽  
pp. 3595-3605
Author(s):  
Lawrence Shi ◽  
Qiliang Li
Keyword(s):  
Strain Engineering ◽  
Quantum Spin ◽  
Band Gaps ◽  
Quantum Spin Hall

Asymmetric functionalization and strain engineering of germanene are excellent methods to design new 2D TIs with large SOC band gaps.

A New Type of Large‐Gap Quantum Spin Hall Insulator Material ZrSe 5

2021 ◽  
Author(s):  
Xing Wang ◽  
Wenhui Wan ◽  
Yanfeng Ge ◽  
Jun Li ◽  
Yong Liu
Keyword(s):  
Quantum Spin ◽  
New Type ◽  
Quantum Spin Hall

scholarly journals Doping-Induced Quantum Spin Hall Insulator to Superconductor Transition

2021 ◽  
Vol 126 (20) ◽  
Author(s):  
Zhenjiu Wang ◽  
Yuhai Liu ◽  
Toshihiro Sato ◽  
Martin Hohenadler ◽  
Chong Wang ◽  
...  
Keyword(s):  
Quantum Spin ◽  
Quantum Spin Hall

scholarly journals Signature of Large-Gap Quantum Spin Hall State in the Layered Mineral Jacutingaite

Nano Letters ◽  
2020 ◽  
Vol 20 (7) ◽  
pp. 5207-5213 ◽  
Author(s):  
Konrád Kandrai ◽  
Péter Vancsó ◽  
Gergő Kukucska ◽  
János Koltai ◽  
György Baranka ◽  
...  
Keyword(s):  
Quantum Spin ◽  
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.

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