Thermal Spin-Orbit Torque in Spintronics

Autor:	Wang, Zheng-Chuan
Rok vydání:	2021
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Quantum Physics
Druh dokumentu:	Working Paper
DOI:	10.1140/epjb/s10051-022-00275-3
Popis:	Within the spinor Boltzmann equation (SBE) formalism, we derived a temperature dependent thermal spin-orbit torque based on local equilibrium assumption in a system with Rashba spin-orbit interaction. If we expand the distribution function of spinor Boltzmann equation around local equilibrium distribution, we can obtain the spin diffusion equation from SBE, then the spin transfer torque, spin orbit torque as well as thermal spin-orbit torque we seek to can be read out from this equation. It exhibits that this thermal spin-orbit torque originates from the temperature gradient of local equilibrium distribution function, which is explicit and straightforward than previous works. Finally, we illustrate them by an example of spin-polarized transport through a ferromagnet with Rashba spin-orbit coupling, in which those torques driven whatever by temperature gradient or bias are manifested quantitatively. Comment: 15pages,6figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2112.01370 Zobrazit plný text záznamu View this record from Arxiv