Valley-polarized interlayer conduction of anisotropic Dirac fermions in SrMnBi2

Y. J. Jo, Joonbum Park, G. Lee, Man Jin Eom, E. S. Choi, Ji Hoon Shim, W. Kang, Jun Sung Kim

Research output: Contribution to journalArticlepeer-review

49 Scopus citations


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.

Original languageEnglish
Article number156602
JournalPhysical Review Letters
Issue number15
StatePublished - 6 Oct 2014

Bibliographical note

Publisher Copyright:
© 2014 American Physical Society.


Dive into the research topics of 'Valley-polarized interlayer conduction of anisotropic Dirac fermions in SrMnBi2'. Together they form a unique fingerprint.

Cite this