Valley-Polarized Interlayer Conduction of Anisotropic Dirac Fermions in SrMnBi2
SCIE
SCOPUS
- Title
- Valley-Polarized Interlayer Conduction of Anisotropic Dirac Fermions in SrMnBi2
- Authors
- Jo, YJ; Park, J; Lee, G; Man Jin Eom,; Choi, ES; Shim, JH; Kang, W; Kim, JS
- Date Issued
- 2014-10-06
- Publisher
- AMER PHYSICAL SOC
- Abstract
- We report the valley-selective interlayer conduction of SrMnBi2 under in-plane magnetic fields. The c-axis resistivity of SrMnBi2 shows clear angular magnetoresistance oscillations indicating coherent interlayer conduction. Strong fourfold variation of the coherent peak in the c-axis resistivity reveals that the contribution of each Dirac valley is significantly modulated by the in-plane field orientation. This originates from anisotropic Dirac Fermi surfaces with strong disparity in the momentum-dependent interlayer coupling. Furthermore, we found a signature of broken valley symmetry at high magnetic fields. These findings demonstrate that a quasi-two-dimensional anisotropic Dirac system can host a valley-polarized interlayer current through magnetic valley control.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/14337
- DOI
- 10.1103/PHYSREVLETT.113.156602
- ISSN
- 0031-9007
- Article Type
- Article
- Citation
- PHYSICAL REVIEW LETTERS, vol. 113, no. 15, page. 156602 - 156605, 2014-10-06
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