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Magnetic-field-induced robust zero Hall plateau state in MnBiTe Chern insulator.
Nat Commun
July 2021
State Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing, China.
The intrinsic antiferromagnetic topological insulator MnBiTe provides an ideal platform for exploring exotic topological quantum phenomena. Recently, the Chern insulator and axion insulator phases have been realized in few-layer MnBiTe devices at low magnetic field regime. However, the fate of MnBiTe in high magnetic field has never been explored in experiment.
View Article and Find Full Text PDFQuasiparticle Tunneling across an Exciton Condensate.
Phys Rev Lett
June 2020
Max Planck Institute for Solid State Research, Heisenbergstrasse 1, D-70569 Stuttgart, Germany.
Article Synopsis
- The bilayer quantum Hall state at total filling factor one has been extensively researched, revealing phenomena like Josephson-like tunneling and zero Hall resistance.
- The focus has shifted to understanding the edge physics, specifically through quasiparticle tunneling observed at a quantum point contact.
- These tunneling results show a zero bias peak that aligns with theoretical expectations and suggests the presence of fractional charge, indicating potential interactions between the chiral edge and the bulk.
Zero-Hall-resistance state in a semimetallic InAs/GaSb superlattice.
Phys Rev B Condens Matter
April 1996
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