Year: 2008
Type: article
Abstract: Current-induced torque is formulated based on the spin continuity equation. The formulation does not rely on the assumption of separation of local spin and charge degrees of freedom, in contrast to approaches based on the $s\text{\ensuremath{-}}d$ model or mean-field approximation of itinerant ferromagnetism. This method would be thus useful for the estimation of torques in actual materials by first-principles calculations. As an example, the formalism is applied to the adiabatic limit of the $s\text{\ensuremath{-}}d$ model in order to obtain the analytical expression for torques and the corresponding $\ensuremath{\beta}$ terms arising from spin relaxation due to spin-flip scattering and spin-orbit interaction.
Source: Physical Review B
Authors: Gen Tatara, Peter Entel
Institutions: Tokyo Metropolitan University, University of Duisburg-Essen
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funder: Deutsche Forschungsgemeinschaft
OpenAlex ID: W2042060065