Spin Accumulation and Equilibrium Currents at the Edge of 2DEGs with Spin-Orbit Coupling

Abstract

We show that in a two dimensional electron gas (2DEG) the interplay between the Rashba spin-orbit coupling and a potential barrier (eg., the sample edge) generates interesting spin effects. In the presence of an external charge current, a spin accumulation is built up near the barrier while in equilibrium there is an inhomogeneous spin current which is localized at the barrier and flows parallel to it. When an in-plane magnetic field perpendicular to the barrier is applied, the system also develops an inhomogeneous charge current density. These effects originate purely from the structure of the eigenstates near the boundary.

arXiv comment4 pages, 4 figures, published version

References in corpus (17)

• 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
• Gate-Controlled Spin-Orbit Quantum Interference Effects in Lateral Transport
• Effect of the spin-orbit interaction on the band structure and conductance of quasi-one-dimensional systems
• Spin Accumulation in Quantum Wires with Strong Rashba Spin-Orbit Coupling
• Anisotropic transport in the two-dimensional electron gas in the presence of spin-orbit coupling
• Can Non-Equilibrium Spin Hall Accumulation be Induced in Ballistic Nanostructures?
• Spin polarization of electrons by non-magnetic heterostructures : basics of spin-optics
• Spin-Hall Effect in Two-Dimensional Electron Systems with Rashba Spin-Orbit Coupling and Disorder
• Spin separation in cyclotron motion
• Datta-Das transistor with enhanced spin control
• Transport equations for a two-dimensional electron gas with spin-orbit interaction
• Transverse Electron Focusing in Systems with Spin-Orbit Coupling
• Rashba effect in 2D mesoscopic systems with transverse magnetic field

Cited by in corpus (49)

• Spin currents and spin superfluidity
• Anomalous Josephson Current in Junctions with Spin-Polarizing Quantum Point Contacts
• Bias-controllable intrinsic spin polarization in a quantum dot
• Persistent spin current in nano-devices and definition of the spin current
• Spin Hall Effect
• Edge spin accumulation in semiconductor two-dimensional hole gases
• Persistent spin current in a spin-orbit coupling/normal hybrid ring
• Rashba interaction in quantum wires with in-plane magnetic fields
• First-Principles Evaluation of the Dzyaloshinskii--Moriya Interaction
• Evanescent states in 2D electron systems with spin-orbit interaction and spin-dependent transmission through a barrier
• Spin Hall effect and zitterbewegung in an electron waveguide
• Spin-Hall effects in a Josephson contact
• Polarized Electric Current in Semiclassical Transport with Spin-Orbit Interaction
• Spin accumulation in ballistic Rashba bar
• Spin Hall utilizing U(1) and SU(2) gauge fields
• Gauge symmetry breaking and topological quantization for the Pauli Hamiltonian
• Role of Berry curvature in the generation of spin currents in Rashba systems
• Majorana-like localized spin density without bound states in topologically trivial spin-orbit coupled nanowires
• Mesoscopic Spin-Hall Effect in 2D electron systems with smooth boundaries
• Giant mesoscopic spin Hall effect on surface of topological insulator
• Magnetic field effects on a nanowire with inhomogeneous Rashba spin-orbit coupling: Spin properties at equilibrium
• Spin Hall effect due to intersubband-induced spin-orbit interaction in symmetric quantum wells
• Spin angular impulse due to spin-dependent reflection off a barrier
• Evanescent states in quantum wires with Rashba spin-orbit coupling
• Edge spin accumulation: spin Hall effect without bulk spin current
• Magnetic breakdown of cyclotron orbits in systems with Rashba and Dresselhaus spin-orbit coupling
• Spin-dependent tunneling into an empty lateral quantum dot
• Edge-induced spin polarization in two-dimensional electron gas
• Surface states, Friedel oscillations, and spin accumulation in p-doped semiconductors
• Spin Hall Conductance of the Two Dimensional Hole Gas in a Perpendicular Magnetic Field
• Spin densities in parabolic quantum wires with Rashba spin-orbit interaction
• Pure spin-current generated by reflection at a normal metal/2DEG interface
• Giant edge spin accumulation in a symmetric quantum well with two subbands
• Edge spin accumulation in 2D electron and hole systems in a quasi-ballistic regime
• Unitarity of scattering and edge spin accumulation
• Spin Filtering via Resonant Reflection of Relativistic Surface States
• Persistent spin current in spin-orbit coupling systems in the absence of an external magnetic field
• Magnetoelectric torque and edge currents caused by spin-orbit coupling
• Perfect spin filtering device through a Mach Zehnder interferometer in GaAs/AlGaAs electron gas
• Steady-state spin densities and currents
• Spin currents in a normal two-dimensional electron gas in contact with a spin-orbit interaction region
• Spin Currents in Rashba Altermagnets: From Equilibrium to Nonlinear Regimes
• Mach-Zehnder Interferometric device for spin filtering in a GaAs/AlGaAs electron gas
• Interface states in two-dimensional electron systems with spin-orbital interaction
• Anisotropic profiles in the spin polarization of multichannel semiconductor rings with Rashba spin orbit coupling
• Imaging transverse electron focusing in semiconducting heterostructures with spin-orbit coupling
• Magnetoelectric torque and edge currents in spin-orbit coupled graphene nanoribbons
• Effect of boundary scattering on spin-hall effect
• Spin-flip reflection of electrons from a potential barrier in heterostructures