Spin transport in n-type single-layer transition-metal dichalcogenides

Z. Yue, Kun Tian, A. Tiwari, and M. E. Raikh
Phys. Rev. B 93, 195301 – Published 3 May 2016

Abstract

Valley asymmetry of the electron spectrum in transition-metal dichalcogenides (TMDs) originates from the spin-orbit coupling. Presence of spin-orbit fields of opposite signs for electrons in K and K valleys in combination with possibility of intervalley scattering result in a nontrivial spin dynamics. This dynamics is reflected in the dependence of nonlocal resistance on external magnetic field (the Hanle curve). We calculate theoretically the Hanle shape in TMDs. It appears that, unlike conventional materials without valley asymmetry, the Hanle shape in TMDs is different for normal and parallel orientations of the external field. For normal orientation, it has two peaks for slow intervalley scattering, while for fast intervalley scattering, the shape is usual. For parallel orientation, the Hanle curve exhibits a cusp at zero field. This cusp is a signature of a slow-decaying valley-asymmetric mode of the spin dynamics.

  • Figure
  • Figure
  • Figure
  • Received 25 February 2016

DOI:https://doi.org/10.1103/PhysRevB.93.195301

©2016 American Physical Society

Authors & Affiliations

Z. Yue1, Kun Tian2, A. Tiwari2, and M. E. Raikh1

  • 1Department of Physics and Astronomy, University of Utah, Salt Lake City, Utah 84112, USA
  • 2Department of Materials Science and Engineering, University of Utah, Salt Lake City, Utah 84112, USA

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 93, Iss. 19 — 15 May 2016

Reuse & Permissions
Access Options
CHORUS

Article Available via CHORUS

Download Accepted Manuscript
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×