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Title: Electrically tunable valley polarization in Weyl semimetals with tilted energy dispersion
Authors: Yesilyurt, C.
Siu, Z.B. 
Tan, S.G.
Liang, G. 
Yang, S.A.
Jalil, M.B.A. 
Issue Date: 2019
Publisher: Nature Publishing Group
Citation: Yesilyurt, C., Siu, Z.B., Tan, S.G., Liang, G., Yang, S.A., Jalil, M.B.A. (2019). Electrically tunable valley polarization in Weyl semimetals with tilted energy dispersion. Scientific Reports 9 (1) : 4480. ScholarBank@NUS Repository.
Rights: Attribution 4.0 International
Abstract: Tunneling transport across electrical potential barriers in Weyl semimetals with tilted energy dispersion is investigated. We report that the electrons around different valleys experience opposite direction refractions at the barrier interface when the energy dispersion is tilted along one of the transverse directions. Chirality dependent refractions at the barrier interface polarize the Weyl fermions in angle-space according to their valley index. A real magnetic barrier configuration is used to select allowed transmission angles, which results in electrically controllable and switchable valley polarization. Our findings may pave the way for experimental investigation of valley polarization, as well as valleytronic and electron optic applications in Weyl semimetals. © 2019, The Author(s).
Source Title: Scientific Reports
ISSN: 2045-2322
DOI: 10.1038/s41598-019-40947-2
Rights: Attribution 4.0 International
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