Helical-edge transport near ν = 0 of monolayer graphene
The complex nature of filling factor ν = 0 of monolayer graphene is studied in magnetotransport experiments. As a function of perpendicular magnetic field a metal-insulator transition is observed, which is attributed to disorder-induced Landau level broadening in the canted antiferromagnetic phase....
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Published in | Current applied physics Vol. 27; pp. 25 - 30 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
01.07.2021
한국물리학회 |
Subjects | |
Online Access | Get full text |
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Summary: | The complex nature of filling factor ν = 0 of monolayer graphene is studied in magnetotransport experiments. As a function of perpendicular magnetic field a metal-insulator transition is observed, which is attributed to disorder-induced Landau level broadening in the canted antiferromagnetic phase. In the metallic regime a separation of the zeroth Landau level appears and signs of the quantum spin Hall effect are seen near ν = 0. In addition to local transport, nonlocal transport experiments show results being consistent with helical edge transport.
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•A metal-insulator transition with perpendicular magnetic field was observed at ν = 0 of monolayer graphene.•The insulating phase is understood by canted antiferromagnetic phase as previously reported.•The metallic phase results from gap closing of canted antiferromagnetic phase due to disorder-induced Landau level broadening.•A nonlocal transport results also support the helical transport of ν = 0 of monolayer graphene. |
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Bibliography: | https://www.sciencedirect.com/science/article/pii/S1567173921000869?via%3Dihub |
ISSN: | 1567-1739 1878-1675 |
DOI: | 10.1016/j.cap.2021.04.001 |