Two- and one-dimensional quantum spin Hall states in stanene-functionalized GaTe and InTe matrices

2019 ◽  
Vol 7 (26) ◽  
pp. 7929-7937 ◽  
Author(s):  
T. V. Menshchikova ◽  
I. P. Rusinov ◽  
P. Golub ◽  
I. Yu. Sklyadneva ◽  
R. Heid ◽  
...  
Keyword(s):  
Chemical Bonding ◽  
Electronic Structures ◽  
Van Der Waals ◽  
Quantum Spin ◽  
One Dimensional ◽  
Topological Materials ◽  
Bonding Characteristics ◽  
Hall States ◽  
Quantum Spin Hall

The surface and edge electronic structures as well as underlying chemical bonding characteristics in van der Waals topological materials GaSnTe and InSnTe are studied.

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.

Tunable quantum order in bilayer Bi2Te3: Stacking dependent quantum spin Hall states

2018 ◽  
Vol 112 (24) ◽  
pp. 243103 ◽  
Author(s):  
Liangzhi Kou ◽  
Chengwang Niu ◽  
Huixia Fu ◽  
Yandong Ma ◽  
Binghai Yan ◽  
...  
Keyword(s):  
Quantum Spin ◽  
Quantum Order ◽  
Hall States ◽  
Quantum Spin Hall

scholarly journals One-dimensional spin texture of Bi(441): Quantum spin Hall properties without a topological insulator

2015 ◽  
Vol 91 (16) ◽  
Author(s):  
M. Bianchi ◽  
F. Song ◽  
S. Cooil ◽  
Å. F. Monsen ◽  
E. Wahlström ◽  
...  
Keyword(s):  
Topological Insulator ◽  
Quantum Spin ◽  
One Dimensional ◽  
Spin Texture ◽  
Quantum Spin Hall

scholarly journals Quantum Spin Hall States in Stanene/Ge(111)

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Yimei Fang ◽  
Zhi-Quan Huang ◽  
Chia-Hsiu Hsu ◽  
Xiaodan Li ◽  
Yixu Xu ◽  
...  
Keyword(s):  
Quantum Spin ◽  
Hall States ◽  
Quantum Spin Hall

scholarly journals Functionalized bismuth films: Giant gap quantum spin Hall and valley-polarized quantum anomalous Hall states

2015 ◽  
Vol 91 (4) ◽  
Author(s):  
Chengwang Niu ◽  
Gustav Bihlmayer ◽  
Hongbin Zhang ◽  
Daniel Wortmann ◽  
Stefan Blügel ◽  
...  
Keyword(s):  
Quantum Spin ◽  
Bismuth Films ◽  
Hall States ◽  
Quantum Spin Hall
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