Spin transport in monolayer molybdenum disulfide (MoS2)

Abstract

In this work, we have computationally simulated and theoretically studied spin polarized electronic transport along the length of monolayer molybdenum disulfide (MoS2). We have implemented semi-classical Monte Carlo method for computational simulation. In the monolayer MoS2, electron's ensemble averaged spin relaxation is due to D'yakonov-Perel (DP) relaxation mechanisms and Elliott-Yafet (EY) relaxation mechanisms. We estimate spin relaxation length in the range of 0.4 um. We also investigate the effect of temperature variation on the spin relaxation length in monolayer MoS2. We observed monotonous decrease in the spin relaxation length in temperature range of 77 K to 150 K with 24.8 % relative change in spin relaxation length. In 150 K to 230 K range relative change decreases to 19.6 %. Further in the 230 K to 300 K temperature ranges relative change remains 14.1 % and in the 300 K to 373 K range relative change in spin relaxation length decreases to 7.3 %. We observed that spin relaxation length marginally changes in the room temperature range of 300 K to 373 K and decrease in spin relaxation length is due to increase in phonon scattering at room temperature.