Effective model analysis of intrinsic spin Hall effect with magnetism in stacked-kagome Weyl semimetal Co3Sn2S2

Abstract

We theoretically study the spin Hall effect in a simple tight-binding model of stacked-kagome Weyl semimetal Co3Sn2S2 with ferromagnetic ordering. We focus on the two types of the spin Hall current: one flowing in the in-plane direction with respect to the kagome lattice (in-plane spin Hall current), and one flowing in the stacking direction (out-of-plane spin Hall current). We show the spin Hall conductivities for those spin currents drastically change depending on the direction of the magnetic moment. Especially, the out-of-plane spin Hall current may induce surface spin accumulation, which are useful for the perpendicular magnetization switching via spin-orbit torque.

8 pages, 5 figures

References in corpus (8)

• Spin and spin current -- From fundamentals to recent progress
• Universal charge and current on magnetic domain walls in Weyl semimetals
• Unusual exchange couplings and intermediate temperature Weyl state in Co3Sn2S2
• First-principles investigation of magnetic and transport properties in hole-doped shandite compounds Co${}_3$In${}_x$Sn${}_{2-x}$S${}_2$
• Magnetic orderings from spin-orbit coupled electrons on kagome lattice
• Self-consistent Analysis of Doping Effect for Magnetic Ordering in Stacked-Kagome Weyl System
• Spin and anomalous Hall effects emerging from topological degeneracy in Dirac fermion system CuMnAs
• Enhancement of Spin-Charge Conversion Efficiency for Co${}_3$Sn${}_2$S${}_2$ across Transition from Paramagnetic to Ferromagnetic Phase

Cited by in corpus (5)

• Topological transitions by magnetization rotation in kagome monolayers of ferromagnetic Weyl semimetal Co-based shandite
• Light-induced anomalous Hall conductivity in massive 3D Dirac semimetal Co${}_3$Sn${}_2$S${}_2$
• Chiral gauge field in fully-spin polarized Weyl semimetal with magnetic domain walls
• Intrinsic spin Nernst effect in topological Dirac and magnetic Weyl semimetals
• Magnetization-Tunable Topological Phase Transitions in Ferromagnetic Kagome Monolayers of Co${}_3$X${}_3$Y${}_2$ ($X=\mathrm{Sn},\mathrm{Pb}$; $Y=\mathrm{S},\mathrm{Se}$)