On the conservation of spin currents in spin-orbit coupled systems
arXiv:cond-mat/0512345 · doi:10.1103/PhysRevB.74.125313
Abstract
Applying the Gordon-decomposition-like technique, the convective spin current (CSC) is extracted from the total angular-momentum current. The CSC describes the transport properties of the electron spin and is conserved in the relativistic quantum mechanics approach where the spin-orbit coupling has been intrinsically taken into account. Arrestingly, in the presence of external electromagnetic field, the component of the convective spin along the field remain still conserved. This conserved CSC is also derived for the first time in the nonrelativistic limit using the Foldy-Wouthuysen transformation.
5 pages, RevTeX4
References in corpus (27)
- Spintronics: Fundamentals and applications
- Spin Hall effect
- Universal Intrinsic Spin-Hall Effect
- Dissipationless Quantum Spin Current at Room Temperature
- Experimental observation of the spin-Hall effect in a two dimensional spin-orbit coupled semiconductor system
- Spin current and polarization in impure 2D electron systems with spin-orbit coupling
- Suppression of the Persistent Spin Hall Current by Defect Scattering
- On A Proper Definition of Spin Current
- SU(2) Non-Abelian Holonomy and Dissipationless Spin Current in Semiconductors
- Semiclassical theory of spin transport in spin-orbit coupled systems
- Ab initio calculation of intrinsic spin Hall effect in semiconductors
- Spin-Hall conductivity due to Rashba spin-orbit interaction in disordered systems
- Intrinsic Spin Hall Effect in the Two Dimensional Hole Gas
- Resonant Spin Hall Conductance in Two-Dimensional Electron Systems with Rashba Interaction in a Perpendicular Magnetic Field
- The definition of the spin current: The angular spin current and its physical consequences
- The angular spin current and its physical consequences
- Spin-Hall transport of heavy holes in III-V semiconductor quantum wells
- Absence of vertex correction for the spin Hall effect in p-type semiconductors
- Dissipation effects in spin-Hall transport of electrons and holes
- Intrinsic Spin and Orbital-Angular-Momentum Hall Effect
- SU(2)xU(1) unified theory for charge, orbit and spin currents
- Sum rules for spin-Hall conductivity cancelation
- Spin-Hall and spin-diagonal conductivity in the presence of Rashba and Dresselhaus spin-orbit coupling
- Spin Hall effect of conserved current: Conditions for a nonzero spin Hall current
- Consistency in Formulation of Spin Current and Torque Associated with a Variance of Angular Momentum
- Spin Current in Spin-Orbit Coupling Systems
- On the Nature of Spin Currents
Cited by in corpus (9)
- Torque and conventional spin-Hall currents in two-dimensional spin-orbit coupled systems: Universal relation and hyper-selection rule
- Spin edge states: an exact solution and oscillations of the spin current
- Spin torque contribution to the a.c. spin Hall conductivity
- Description of spin transport and precession in spin-orbit coupling systems and a general equation of continuity
- Intrinsic electric polarization in spin-orbit coupled semiconductor heterostructures
- Gauge Covariance and Spin Current Conservation in the Gauge Field Formulation of Systems with Spin-Orbit Coupling
- Spin Hall effect associated with SU(2) gauge field
- Intrinsic Spin Hall Effect with Spin-Tensor-Momentum Coupling
- Some exact identities connecting one- and two-particle Green's functions in spin-orbit coupling systems