D'yakonov-Perel' spin relaxation in a bilayer with local structural inversion asymmetry

• Hayashida, Kenji

• Akera, Hiroshi

Abstract

The spin relaxation in the D'yakonov-Perel' mechanism is theoretically studied in a symmetric double-quantum-well structure (DQWS) with an intersubband spin-orbit interaction (SOT) due to the local structural inversion asymmetry and the linear-in-wave-number Dresselhaus SOI. It is found that the spin relaxation rate - induced by the intersubband SOI exhibits a suppression with omega tau(p) in the Lorentzian form of (1 + omega(2)tau(2)(p))(-1), where h omega is the intersubband energy separation and tau(p) is the momentum relaxation time. The present Lorentzian suppression leads to a crossover with increasing omega tau(p) from the D'yakonov-Perel'-type relaxation (the spin relaxation time tau(s) proportional to tau(-1)(p)) to the Elliott-Yafet-type relaxation (tau(s) proportional to tau(p)). It is also shown that the spin relaxation rate in the presence of both the linear Dresselhaus SOI and the intersubband SOI is isotropic with respect to the in-plane spin direction in the present DQWS in contrast to a single quantum well exhibiting an in-plane anisotropy.

Journal

• Physical Review B

  Physical Review B 101 (3), 035306-, 2020-01-31

  American Physical Society (APS)

Details

• CRID: 1050002212667716480
• NII Article ID: 120006809285
• DOI: 10.1103/physrevb.101.035306
• ISSN: 24699969
• ISSN: 24699950
• HANDLE: 2115/76925
• Web Site: https://link.aps.org/article/10.1103/PhysRevB.101.035306
• Web Site: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevB.101.035306/fulltext
• Text Lang: en
• Article Type: journal article
• Data Source:
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