Microscopic approach to current-driven domain wall dynamics
By G. Tatara, H. Kohno, J. Shibata. 2008
345 citations recorded by the source corpus.
Abstract This review describes in detail the essential techniques used in microscopic theories on spintronics. We have investigated the domain wall dynamics induced by an electric current, based on the s – d exchange model. The domain wall is treated as rigid and planar and is described by two collective coordinates: the position and angle of wall magnetization. The effect of conduction electrons on the domain wall dynamics is calculated in the case of slowly varying spin structure (close to the adiabatic limit) by use of a gauge transformation. The spin-transfer torque and force on the wall are expressed by Feynman diagrams and calculated systematically using non-equilibrium Green’s functions, treating electrons fully quantum mechanically. The wall dynamics is discussed, based on two coupled equations of motion derived for two collective coordinates. The force is related to electron transport properties, resistivity, and the Hall effect. The effect of conduction electron spin relaxation on the torque and wall dynamics is also studied.
Subfields: Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/fb262158e0e2706ed8460fac4abf21501c12dc84
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In Atomic and Molecular Physics, and Optics
In Electrical and Electronic Engineering
Citations in the corpus
- Current-induced domain wall motion in nanoscale ferromagnetic elements (2011, background): “Probably the best known storage device is the magnetic disk drive [1], which was pioneered in the 1950s by IBM with the RAMAC and since then the storage density has seen a gigantic exponential increase.”
- Ginzburg-Landau theory for skyrmions in inversion-symmetric magnets with competing interactions (2015, background): “[43] Gen Tatara, Hiroshi Kohno, and Junya Shibata, “Microscopic approach to current-driven domain wall dynamics,” Phys.”