Kavli Affiliate: Mamoru Matsuo
| First 5 Authors: Yuya Ominato, Masaki Yama, Ai Yamakage, Mamoru Matsuo, Takeo Kato
| Summary:
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.
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