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  Berry curvature dipole in Weyl semimetal materials: An ab initio study

Zhang, Y., Sun, Y., & Yan, B. (2018). Berry curvature dipole in Weyl semimetal materials: An ab initio study. Physical Review B, 97(4): 041101, pp. 1-6. doi:10.1103/PhysRevB.97.041101.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0000-27B8-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0000-27BB-2
Genre: Journal Article

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 Creators:
Zhang, Yang1, Author              
Sun, Yan1, Author              
Yan, Binghai2, Author
Affiliations:
1Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
2External Organizations, ou_persistent22              

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 Abstract: Noncentrosymmetric metals are anticipated to exhibit a dc photocurrent in the nonlinear optical response caused by the Berry curvature dipole in momentum space. Weyl semimetals (WSMs) are expected to be excellent candidates for observing these nonlinear effects because they carry a large Berry curvature concentrated in small regions, i.e., near the Weyl points. We have implemented the semiclassical Berry curvature dipole formalism into an ab initio scheme and investigated the second-order nonlinear response for two representative groups of materials: the TaAs-family type-I WSMs and the MoTe2-family type-II WSMs. Both types of WSMs exhibited a Berry curvature dipole in which type-II Weyl points are usually superior to the type-I WSM because of the strong tilt. Corresponding nonlinear susceptibilities in several materials promise a nonlinear Hall effect in the dc field limit, which is within the experimentally detectable range.

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Language(s): eng - English
 Dates: 2018-01-032018-01-03
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1103/PhysRevB.97.041101
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 97 (4) Sequence Number: 041101 Start / End Page: 1 - 6 Identifier: ISSN: 1098-0121
CoNE: /journals/resource/954925225008