Intrinsic Spin Hall Conductivity of MoTe2 and WTe2 Semimetals

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.

References in corpus (8)

• Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
• Advanced capabilities for materials modelling with Quantum ESPRESSO
• First Principles Calculation of Anomalous Hall Conductivity in Ferromagnetic bcc Fe
• Study of Intrinsic Spin Hall Effect and Orbital Hall Effect in 4d- and 5d- Transition Metals
• Determination of intrinsic spin Hall angle in Pt
• Thickness dependence of spin-orbit torques generated by WTe2
• Anisotropic spin Hall effect from first principles
• Giant Enhancement of Intrinsic Spin Hall Conductivity in $\beta$ Tungsten via Substitutional Doping

Cited by in corpus (3)

• Large tunneling magnetoresistance in VSe2/MoS2 magnetic tunnel junction
• Magnetic asymmetry induced anomalous spin-orbit torque in IrMn
• Unconventional spin-orbit torque in transition metal dichalcogenide/ferromagnet bilayers from first-principles calculations