Spin Pumping into two-dimensional systems

TL;DR

This review discusses recent theoretical advances in spin pumping phenomena in two-dimensional systems, highlighting their potential for probing spin transport, superconductivity, and spin-orbit effects in low-dimensional materials.

Contribution

It synthesizes recent theoretical developments on spin pumping in 2D systems, emphasizing their applications in probing spin transport, superconductivity, and spin-orbit interactions.

Findings

FMR linewidth enhancements as probes of superconducting pairing symmetries

Gate-controlled spin transport in 2D electron gases with spin-orbit interactions

Valley-selective spin excitations and spin-current Hall effect in TMD monolayers

Abstract

In this review, we present recent theoretical developments on spin transport phenomena probed by ferromagnetic resonance (FMR) modulation in two-dimensional systems coupled to magnetic materials. We first address FMR linewidth enhancements induced by spin pumping at interfaces, emphasizing their potential as sensitive probes of superconducting pairing symmetries in two-dimensional superconductors. We then examine FMR modulation due to spin pumping into two-dimensional electron gases formed in semiconductor heterostructures, where the interplay of Rashba and Dresselhaus spin-orbit interactions enables gate-controlled spin transport and persistent spin textures. Finally, we investigate spin pumping in monolayer transition-metal dichalcogenides, where spin-valley coupling and Berry curvature effects lead to valley-selective spin excitations and a spin-current Hall effect. These developments demonstrate that the spin pumping technique provides a versatile tool for probing spin transport and spin-dependent phenomena in low-dimensional systems, offering a basis for future spintronics applications.