Research Paper: Inverse Spin Hall Effect and Spin Seebeck Effect in Tungsten Disulfide

Abstract

In this paper, the dependence of the spin pumping effect on a layer of tungsten disulfide (WS2) by the inverse Hall spin effect (ISHE) is investigated. The precession motion of the magnetization vector creates the effect of spin pumping on a non-conductive ferrimagnetic film. A stream of polarized spin electrons is then injected into the NM layer of a non-magnetic material such as Pt. This spin current is converted to electric current by the ISHE. We investigated the efficiency of spin injection into tungsten disulfide WS and found that as the film thickness increased, the ISHE voltage also increased and compared this relationship with the theory. Next, we obtained the spin diffusion length and conductivity of the spin mixture by varying the damping coefficient of Gilbert with thickness. As far as we know, similar studies have been performed here on materials such as yttrium-iron-garnet or Mo1-xWxS2 alloy, but not on tungsten disulfide. Studies such as the effect of spin-orbit coupling, the study of second-order Riemann scattering, and the like, have been performed on tungsten disulfide and are still ongoing. We hope this will guide for the development of further studies in this field.

Keywords

• the inverse hall spin effect (ishe)
• spin pumping
• gilbert damping
• spin waves
• tungsten disulfide