Spin Hall effect due to intersubband-induced spin-orbit interaction in symmetric quantum wells

2009/07/31 by Minchul Lee, Marco O. Hachiya, E. Bernardes +3 · 1 citation
Physics and Astronomy · #Magnetic properties of thin films #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.mes-hall #cond-mat.mtrl-sci

paper · pdf · doi:10.1103/physrevb.80.155314

published as Phys. Rev. B 80, 155314 (2009) · 7 pages, 3 figures

openalex publication_date 2009/10/12 · arxiv created 2009/10/15 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We investigate the intrinsic spin Hall effect in two-dimensional electron gases in quantum wells with two subbands, where a new intersubband-induced spin-orbit coupling is operative. The bulk spin Hall conductivity \ensuremathσ_xy^z is calculated in the ballistic limit within the standard Kubo formalism in the presence of a magnetic field B and is found to remain finite in the B=0 limit, as long as only the lowest subband is occupied. Our calculated \ensuremathσ_xy^z exhibits a nonmonotonic behavior and can change its sign as the Fermi energy (the carrier areal density n_2D) is varied between the subband edges. We determine the magnitude of \ensuremathσ_xy^z for realistic InSb quantum wells by performing a self-consistent calculation of the intersubband-induced spin-orbit coupling.

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
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• Spin-Hall effect: Back to the beginning at a higher level
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