Extracting current-induced spins: spin boundary conditions at narrow Hall contacts

2007/08/02 by I. Adagideli, İnanç Adagideli, M. Scheid +7 · 1 citation
Physics and Astronomy · #Magnetic properties of thin films #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.mes-hall

paper · pdf · doi:10.1088/1367-2630/9/10/382

published as New J. Phys. 9, 382 (2007) · 18 pages, 7 figures, submitted to NJP focus issue on Spintronics

arxiv created 2007/08/02 · openalex publication_date 2007/10/24 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30

Abstract

We consider the possibility to extract spins that are generated by an electric current in a two-dimensional electron gas with Rashba–Dresselhaus spin–orbit interaction (R2DEG) in the Hall geometry. To this end, we discuss boundary conditions for the spin accumulations between a spin–orbit (SO) coupled region and a contact without SO coupling, i.e. a normal two-dimensional electron gas (2DEG). We demonstrate that in contrast to contacts that extend along the whole sample, a spin accumulation can diffuse into the normal region through finite contacts and be detected by e.g. ferromagnets. For an impedance-matched narrow contact the spin accumulation in the 2DEG is equal to the current induced spin accumulation in the bulk of R2DEG up to a geometry-dependent numerical factor.

Citations

• Spin Current and Polarization in Impure Two-Dimensional Electron Systems with Spin-Orbit Coupling
• Spin-Hall effect in a disordered two-dimensional electron system
• Observation of the Spin Hall Effect in Semiconductors
• Spin-Hall effect: Back to the beginning at a higher level
• Quantum field-theoretical methods in transport theory of metals
• Mesoscopic spin Hall effect in multiprobe ballistic spin-orbit-coupled semiconductor bridges
• Intrinsic Spin Hall Edges
• Spin polarization of conduction electrons induced by electric current in two-dimensional asymmetric electron systems
• Spin-Hall transport of heavy holes in III-V semiconductor quantum wells
• Spintronics: Fundamentals and applications
• Current-Induced Spin Polarization in Strained Semiconductors
• Dissipationless Quantum Spin Current at Room Temperature
• Quasiclassical approach to the spin Hall effect in the two-dimensional electron gas
• Classical Electrodynamics

Cited by

• Spin accumulation in diffusive conductors with Rashba and Dresselhaus spin-orbit interaction