Spin dynamics in the topological elemental gray Tin from first principles perspective

TL;DR

This paper investigates the spin dynamics of topological gray Tin using first-principles calculations and proposes a hybrid electromagnetics-quantum approach to enhance spin-polarized photocurrents, contributing to spintronic device development.

Contribution

It combines density functional theory with a tight-binding model to analyze gray Tin's surface states and introduces a novel hybrid approach to boost spin-polarized photocurrents.

Findings

Calculated topological surface states of gray Tin.

Proposed a hybrid electromagnetics-quantum method to enhance photocurrents.

Provided insights into spin dynamics relevant for spintronic applications.

Abstract

Gray Tin is attracting much more interest as a topological quantum material, which has a precisely controlled composition and can be a material for spintronic devices. However, the spin dynamics in gray Tin is largely unknown. In this paper, we calculate the topological surface state of gray Tin by combining density functional theory and a tight-bind model, also propose an electromagnetics -- quantum mechanics hybrid approach on how to enhance with metastructures the spin polarized photocurrent in gray Tin, which was experimentally measured recently.