Spin Seebeck Effect: Sensitive Probe for Elementary Excitation, Spin Correlation, Transport, Magnetic Order, and Domains in Solids

Abstract

The spin Seebeck effect (SSE) refers to the generation of a spin current as a result of a temperature gradient in a magnetic material, which can be detected electrically via the inverse spin Hall effect in a metallic contact. Since the discovery of SSE in 2008, intensive studies on SSE have been conducted to elucidate its origin. SSEs appear in a wide range of magnetic materials including ferro-, ferri-, and antiferro-magnets and also paramagnets with classical or quantum spin fluctuation. SSE voltage reflects fundamental properties of a magnet, such as elementary excitation, static magnetic order, spin correlation, and spin transport. In this article, we review recent progress on SSEs in various systems, with particular emphasis on its emerging role as a probe of these magnetic properties in solids. We also briefly discuss the recently-discovered nuclear SSE.

This is a review article to be published in Vol. 14 of the Annual Review of Condensed Matter Physics

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• Spin and spin current -- From fundamentals to recent progress
• Mechanism of paramagnetic spin Seebeck effect
• Composition-tunable magnon-polaron anomalies in spin Seebeck effects in epitaxial Bi${}_x$Y${}_{3-x}$Fe${}_5$O${}_{12}$ films
• Thermal effects in spintronic materials and devices: an experimentalist's guide
• Microscopic theory of spin Seebeck effect in antiferromagnets
• Understanding spin currents from magnon dispersion and polarization: Spin-Seebeck effect and neutron scattering study on Tb3Fe5O12
• Spin Seebeck Effect as a Probe for Majorana Fermions in Kitaev Spin Liquids
• Spin Seebeck Effect in Graphene
• Nernst-Ettingshausen effect in thin Pt and W films at low temperatures
• Signature of BKT-like spin transport in a quasi-2D antiferromagnet BaNi${}_2$V${}_2$O${}_8$
• Cryogenic spin Peltier effect detected by a RuO${}_2$-AlO${}_x$ on-chip microthermometer
• Low temperature spin Seebeck effect in non-magnetic vanadium dioxide
• Spin Seebeck effect of interacting spinons
• Statistical characterization of the spin Hall magnetoresistance in YIG/Pt heterostructures
• Spin Seebeck in the weak exchange coupled van der Waals antiferromagnet
• Field Dispersion and Strong Coupling of Nuclear-Electron Spin Excitation in MnCO${}_3$
• Spin Seebeck Effect in Correlated Antiferromagnetic V2O3