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  Electrically tuneable nonlinear anomalous Hall effect in two-dimensional transition-metal dichalcogenides WTe2 and MoTe2

Zhang, Y., van den Brink, J., Felser, C., & Yan, B. (2018). Electrically tuneable nonlinear anomalous Hall effect in two-dimensional transition-metal dichalcogenides WTe2 and MoTe2. 2D Materials, 5(4): 044001, pp. 1-6. doi:10.1088/2053-1583/aad1ae.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-E1EA-9 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-E1EC-7
Genre: Journal Article

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 Creators:
Zhang, Yang1, Author              
van den Brink, Jeroen2, Author
Felser, Claudia3, Author              
Yan, Binghai2, Author
Affiliations:
1Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
2External Organizations, ou_persistent22              
3Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Abstract: We studied the nonlinear electric response in WTe2 and MoTe2 monolayers. When the inversion symmetry is breaking but the the time-reversal symmetry is preserved, a second-order Hall effect called the nonlinear anomalous Hall effect (NLAHE) emerges owing to the nonzero Berry curvature on the nonequilibrium Fermi surface. We reveal a strong NLAHE with a Hall-voltage that is quadratic with respect to the longitudinal current. The optimal current direction is normal to the mirror plane in these two-dimensional (2D) materials. The NLAHE can be sensitively tuned by an out-of-plane electric field, which induces a transition from a topological insulator to a normal insulator. Crossing the critical transition point, the magnitude of the NLAHE increases, and its sign is reversed. Our work paves the way to discover exotic nonlinear phenomena in inversion-symmetry-breaking 2D materials.

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Language(s): eng - English
 Dates: 2018-07-202018-07-20
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1088/2053-1583/aad1ae
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Title: 2D Materials
Source Genre: Journal
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Publ. Info: Bristol : IOP Publ.
Pages: - Volume / Issue: 5 (4) Sequence Number: 044001 Start / End Page: 1 - 6 Identifier: ISSN: 2053-1583
CoNE: /journals/resource/2053-1583