# Intrinsic Spin Hall Conductivity of MoTe2 and WTe2 Semimetals

## TL;DR

This study uses ab initio calculations to analyze the intrinsic spin Hall conductivity of MoTe2 and WTe2 semimetals, revealing large SHC, anisotropic behavior, and methods for optimization through doping, advancing 2D spintronics research.

## Contribution

It provides the first comprehensive ab initio analysis of SHC in MoTe2 and WTe2, highlighting anisotropy, doping effects, and mechanisms behind SHC variation.

## Key findings

- Large intrinsic SHC and spin Hall angles found
- Anisotropic SHC due to crystal symmetry
- SHC can be optimized by electron doping

## Abstract

We report a comprehensive study on the intrinsic spin Hall conductivity (SHC) of semimetals MoTe2 and WTe2 by ab initio calculation. Large SHC and desirable spin Hall angles have been discovered, due to the strong spin orbit coupling effect and low charge conductivity in semimetals. Diverse anisotropic SHC values, attributed to the unusual reduced-symmetry crystalline structure, have been revealed. We report an effective method on SHC optimization by electron doping, and exhibit the mechanism of SHC variation respect to the energy shifting by the spin Berry curvature. Our work provides insights into the realization of strong spin Hall effects in 2D systems.