Model expressions for the spin-orbit interaction and phonon-mediated spin dynamics in quantum dots

Martin Vaughan, Judy Rorison

Research output: Contribution to journalArticle (Academic Journal)peer-review

1 Citation (Scopus)
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Abstract

Model expressions for the spin-orbit interaction (SOI) in a quantum dot are obtained. The resulting form does not neglect cubic terms and allows for a generalized structural inversion asymmetry. We also obtain analytical expressions for the coupling between states for the electron-phonon interaction and use these to derive spin-relaxation rates, which are found to be qualitatively similar to those derived elsewhere in the literature. We find that, due to the inclusion of cubic terms, the Dresselhaus contribution to the ground state spin relaxation disappears for spherical dots. A comparison with previous theory and existing experimental results shows good agreement thereby presenting a clear analytical formalism for future developments. Comparative calculations for potential materials are presented.
Original languageEnglish
Article number014001
Number of pages9
JournalSemiconductor Science and Technology
Volume33
Issue number1
Early online date30 Nov 2017
DOIs
Publication statusPublished - Jan 2018

Keywords

  • spin orbit interaction
  • spin relaxation
  • quantum dots

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  • SPIN SPACE

    Oulton, R.

    29/06/1530/12/18

    Project: Research

  • UK Semiconductors 2018

    Martin P Vaughan (Participant)

    4 Jul 20185 Jul 2018

    Activity: Participating in or organising an event typesParticipation in conference

  • Spin Space Meeting September 2017

    Martin P Vaughan (Participant)

    4 Sep 2017

    Activity: Participating in or organising an event typesParticipation in workshop, seminar, course

  • Spin Space Meeting April 2017

    Martin P Vaughan (Participant)

    21 Apr 2017

    Activity: Participating in or organising an event typesParticipation in workshop, seminar, course

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