Spin and spin current—From fundamentals to recent progress

Along with the progress of spin science and spintronics research, the flow of electron spins, i.e., spin current, has attracted interest. New phenomena and electronic states were explained in succession using the concept of spin current. Moreover, as many of the conventionally known spintronics phen...

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Veröffentlicht in:Journal of applied physics 2023-01, Vol.133 (2)
Hauptverfasser: Maekawa, Sadamichi, Kikkawa, Takashi, Chudo, Hiroyuki, Ieda, Jun’ichi, Saitoh, Eiji
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creator Maekawa, Sadamichi
Kikkawa, Takashi
Chudo, Hiroyuki
Ieda, Jun’ichi
Saitoh, Eiji
description Along with the progress of spin science and spintronics research, the flow of electron spins, i.e., spin current, has attracted interest. New phenomena and electronic states were explained in succession using the concept of spin current. Moreover, as many of the conventionally known spintronics phenomena became well organized based on spin current, it has rapidly been recognized as an essential concept in a wide range of condensed matter physics. In this article, we focus on recent developments in the physics of spin, spin current, and their related phenomena, where the conversion between spin angular momentum and different forms of angular momentum plays an essential role. Starting with an introduction to spin current, we first discuss the recent progress in spintronic phenomena driven by spin-exchange coupling: spin pumping, topological Hall torque, and emergent inductor. We, then, extend our discussion to the interaction/interconversion of spins with heat, lattice vibrations, and charge current and address recent progress and perspectives on the spin Seebeck and Peltier effects. Next, we review the interaction between mechanical motion and electron/nuclear spins and argue the difference between the Barnett field and rotational Doppler effect. We show that the Barnett effect reveals the angular momentum compensation temperature, at which the net angular momentum is quenched in ferrimagnets.
doi_str_mv 10.1063/5.0133335
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source AIP Journals Complete; Alma/SFX Local Collection
subjects Angular momentum
Applied physics
Condensed matter physics
Doppler effect
Electron spin
Electron states
Ferrimagnets
Lattice vibration
Peltier effects
Spintronics
title Spin and spin current—From fundamentals to recent progress
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