Tunable thermoelectricity in monolayers of MoS$_{2}$ and other group-VI dichalcogenides

TL;DR

This paper investigates how off-resonant circularly polarized light can tune the thermoelectric properties of monolayer group-VI dichalcogenides like MoS₂, revealing enhanced spin and valley thermoelectric effects through analytical modeling.

Contribution

It provides analytical expressions for Berry phase effects and demonstrates how off-resonant light tuning improves thermoelectric performance in these materials.

Findings

Band gap tuning enhances spin splitting.

Thermoelectric properties are significantly improved.

Analytical models link light tuning to thermoelectric effects.

Abstract

We study the thermoelectric properties of monolayers of MoS$_{2}$ and other group-VI dichalcogenides under circularly polarized off-resonant light. Analytical expressions are derived for the Berry phase mediated magnetic moment, orbital magnetization, as well as thermal and Nernst conductivities. Tuning of the band gap by {\it off-resonant} light enhances the spin splitting in both the valence and conduction bands and, thus, leads to a dramatic improvement of the spin and valley thermoelectric properties.