A comparison study between topological insulators based on valley Hall and quantum spin Hall effects

2019 ◽  
Vol 145 (3) ◽  
pp. 1762-1762
Author(s):  
Yuanchen Deng ◽  
Yun Jing
Keyword(s):  
Topological Insulators ◽  
Quantum Spin ◽  
Comparison Study ◽  
Hall Effects ◽  
Spin Hall Effects ◽  
Quantum Spin Hall

scholarly journals Spin transistor and quantum spin Hall-effects in CdBxF2−x–p-CdF2–CdBxF2−x sandwich nanostructures

2010 ◽  
Vol 470 (19) ◽  
pp. 893-896 ◽  
Author(s):  
N.T. Bagraev ◽  
O.N. Guimbitskaya ◽  
L.E. Klyachkin ◽  
A.A. Kudryavtsev ◽  
A.M. Malyarenko ◽  
...  
Keyword(s):  
Quantum Spin ◽  
Hall Effects ◽  
Spin Transistor ◽  
Spin Hall Effects ◽  
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 Hinged quantum spin Hall effect in antiferromagnetic topological insulators

2020 ◽  
Vol 101 (4) ◽  
Author(s):  
Yue-Ran Ding ◽  
Dong-Hui Xu ◽  
Chui-Zhen Chen ◽  
X. C. Xie
Keyword(s):  
Hall Effect ◽  
Topological Insulators ◽  
Quantum Spin ◽  
Spin Hall Effect ◽  
Quantum Spin Hall Effect ◽  
Quantum Spin Hall
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