Modeling spin relaxation in semiconductor quantum wells: Modifying the Elliot process

M. P. Vaughan, J. M. Rorison

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Abstract

A model of the Elliot process for spin relaxation is developed that explicitly incorporates the Dresselhaus spin-splitting of the conduction band in semiconductors lacking an inversion symmetry. It is found that this model reduces to existing models in bulk if the scattering matrices are constructed from a superposition of eigenstates. It is shown that the amplitude for intra-sub-band spin relaxation disappears in quantum wells on the basis of existing models. However, an amplitude due to the Dresselhaus spin-splitting remains, becoming increasingly important as the well becomes narrower. It is also shown that this component does not disappear for scattering between spin states at the same wavevector. It is concluded that for quantum wells and lower dimensional semiconductors that this modified model should be used in analysis of the spin dynamics.

Original languageEnglish
Article number094003
Number of pages13
JournalSemiconductor Science and Technology
Volume33
Issue number9
Early online date26 Jul 2018
DOIs
Publication statusPublished - 1 Sep 2018

Keywords

  • quantum wells
  • spin relaxation
  • spin-orbit interaction

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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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