Intrinsic electron spin relaxation due to the D'yakonov-Perel' mechanism in monolayer MoS$_2$

TL;DR

This paper investigates the intrinsic electron spin relaxation mechanisms in monolayer MoS₂, revealing an intervalley in-plane relaxation channel influenced by electron-phonon scattering, with relaxation times decreasing as temperature and electron density increase.

Contribution

It identifies a novel intervalley in-plane spin relaxation channel in monolayer MoS₂ caused by opposite effective magnetic fields and electron-phonon interactions.

Findings

In-plane spin relaxation time decreases with temperature.

In-plane spin relaxation time decreases with electron density.

Intervalley electron-phonon scattering dominates the relaxation process.

Abstract

Intrinsic electron spin relaxation due to the D'yakonov-Perel' mechanism is studied in monolayer Molybdenum Disulphide. An intervalley in-plane spin relaxation channel is revealed due to the opposite effective magnetic fields perpendicular to the monolayer Molybdenum Disulphide plane in the two valleys together with the intervalley electron-phonon scattering. The intervalley electron-phonon scattering is always in the weak scattering limit, which leads to a rapid decrease of the in-plane spin relaxation time with increasing temperature. A decrease of the in-plane spin relaxation time with the increase of the electron density is also shown.