Spin Hall effect in spin-valley coupled monolayer transition-metal dichalcogenides
Mesoscale and Nanoscale Physics
2013-09-20 v2
Abstract
We study both the intrinsic and extrinsic spin Hall effect in spin-valley coupled monolayers of transition metal dichalcogenides. We find that whereas the skew-scattering contribution is suppressed by the large band gap, the side-jump contribution is comparable to the intrinsic one with opposite sign in the presence of scalar and magnetic scattering. Intervalley scattering tends to suppress the side-jump contribution due to the loss of coherence. By tuning the ratio of intra- to intervalley scattering, the spin Hall conductivity shows a sign change in hole-doped samples. Multiband effect in other doping regime is considered, and it is found that the sign change exists in the heavily hole-doped regime, but not in the electron-doped regime.
Keywords
Cite
@article{arxiv.1305.5633,
title = {Spin Hall effect in spin-valley coupled monolayer transition-metal dichalcogenides},
author = {Wen-Yu Shan and Hai-Zhou Lu and Di Xiao},
journal= {arXiv preprint arXiv:1305.5633},
year = {2013}
}