Simran Singh
The van der Waals (vdW) based layered materials and their heterostructures are a modular platform to probe spin related phenomena such as spin-charge interconversion, spin-orbit torques and magnetization dynamics. I will discuss the spin-charge interconversion in vdW bonded few-layer graphene/Platinum (Gra/Pt) heterostructures where we observe a large spin-charge interconversion signal. The spin Hall effect (SHE) in Pt and spin diffusion in graphene layers cannot explain the large spin-charge interconversion signals observed in our heterostructures. This indicates that a mechanism of spin-to-charge conversion other than the SHE (ISHE) is dominant in our devices. Based on previous photoemission studies on the Pt/Gr interface, it is plausible to ascribe the spin-charge interconversion observed in these Pt/Gr interfaces to the Rashba effect.
The layered Weyl semimetal candidate, WTe2, is predicted to host large spin-galvanic effects which can be used to efficiently manipulate the magnetization state of a magnetic system. I will discuss our recent results showing an efficient magnetization switching of a layered ferromagnet system driven by the charge current induced spin currents in WTe2. Time permitting, I will also briefly discuss low temperature broadband magnetization dynamics studies of a layered anti-ferromagnetic system which are aimed at probing the magnetic energy landscape of the layered magnetic systems.