Large Enhancement of Intrinsic Spin Hall Conductivity of β-W Based Alloy

Abstract

In this work, intrinsic spin Hall conductivity of β-W and its alloy with V has been theoretically studied by the combination of ab initio method with the tight binding method. Both two possible configurations of V in β-W structure are fully considered and their total energy difference used to estimate the thermodynamic average SHC of alloy by using Maxwell-Boltzmann distribution. It is found that due to the small total energy difference between two configurations, there is a significant contribution to the thermodynamic average SHC of the alloy from both configurations, which results in the average SHC of alloy being enhanced up to 12.3% compared with the pristine β-W. © 2024 Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.