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Title: Hole spin helix : anomalous spin diffusion in anisotropic strained hole quantum wells
Authors: Sacksteder, Vincent E.
Bernevig, B. Andrei
Keywords: DRNTU::Science::Physics
Issue Date: 2014
Source: Sacksteder, V. E., & Bernevig, B. A. (2014). Hole spin helix: Anomalous spin diffusion in anisotropic strained hole quantum wells. Physical Review B, 89(16), 161307-.
Series/Report no.: Physical review B
Abstract: We obtain the spin-orbit interaction and spin-charge coupled transport equations of a two-dimensional heavy hole gas under the influence of strain and anisotropy. We show that a simple two-band Hamiltonian can be used to describe the holes. In addition to the well-known cubic hole spin-orbit interaction, anisotropy causes a Dresselhaus-like term, and strain causes a Rashba term. We discover that strain can cause a shifting symmetry of the Fermi surfaces for spin up and down holes. We predict an enhanced spin lifetime associated with a spin helix standing wave similar to the Persistent Spin Helix which exists in the two-dimensional electron gas with equal Rashba and Dresselhaus spin-orbit interactions. These results may be useful both for spin-based experimental determination of the Luttinger parameters of the valence-band Hamiltonian and for creating long-lived spin excitations.
ISSN: 1098-0121
DOI: 10.1103/PhysRevB.89.161307
Rights: © 2014 American Physical Society. This paper was published in Physical Review B and is made available as an electronic reprint (preprint) with permission of American Physical Society. The paper can be found at the following official DOI:  One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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