Intrinsic quantum spin Hall and anomalous Hall effects in h-Sb/Bi epitaxial growth on a ferromagnetic MnO2thin film

Nanoscale ◽  
2016 ◽  
Vol 8 (21) ◽  
pp. 11202-11209 ◽  
Author(s):  
Jian Zhou ◽  
Qiang Sun ◽  
Qian Wang ◽  
Yoshiyuki Kawazoe ◽  
Puru Jena
Keyword(s):  
Epitaxial Growth ◽  
Quantum 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 Epitaxial growth of large-gap quantum spin Hall insulator on semiconductor surface

2014 ◽  
Vol 111 (40) ◽  
pp. 14378-14381 ◽  
Author(s):  
Miao Zhou ◽  
Wenmei Ming ◽  
Zheng Liu ◽  
Zhengfei Wang ◽  
Ping Li ◽  
...  
Keyword(s):  
Epitaxial Growth ◽  
Quantum Spin ◽  
Semiconductor Surface ◽  
Quantum Spin Hall
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