Spin Orbit Coupling Effects on The Excitonic Properties of Twisted Moiré Transition Metal Dichalcogenides

Spin-Orbit coupling (SOC) is quite crucial in understanding the electronic and optoelectronic properties of the Transition Metal Dichalcogenides (TMDCs). The excitonic properties and dynamics of twisted TMDC bilayers have a strong dependence on the twist angle as well as on the material composition. Here, we have studied the effects of SOC on the exciton dynamics 2 domains in terms of spin-valley locking and subsequent influence on intralayer and interlayer electronic transitions in homo-bilayer and hetero-bilayer TMDCs twisted close to R or H stacking. Our study paves the path in understanding the twist angle dependence of spin-valley locking in the twisted TMDCs which will be quite beneficial in understanding valley dependent optical selection rules which in turn are crucial for exotic optoelectronic applications of such systems.