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 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 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

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).

scholarly journals Quantum spin Hall effect and topological phase transition in InNxBiySb1−x−y/InSb quantum wells

2017 ◽  
Vol 19 (7) ◽  
pp. 073031 ◽  
Author(s):  
Zhigang Song ◽  
Sumanta Bose ◽  
Weijun Fan ◽  
Dao Hua Zhang ◽  
Yan Yang Zhang ◽  
...  
Keyword(s):  
Phase Transition ◽  
Quantum Wells ◽  
Hall Effect ◽  
Quantum Spin ◽  
Spin Hall Effect ◽  
Topological Phase ◽  
Quantum Spin Hall Effect ◽  
Topological Phase Transition ◽  
Quantum Spin Hall

scholarly journals Quantum Spin Hall and Quantum Anomalous Hall States Realized in Junction Quantum Wells

2014 ◽  
Vol 112 (21) ◽  
Author(s):  
Haijun Zhang ◽  
Yong Xu ◽  
Jing Wang ◽  
Kai Chang ◽  
Shou-Cheng Zhang
Keyword(s):  
Quantum Wells ◽  
Quantum Spin ◽  
Hall States ◽  
Quantum Spin Hall
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