Spin dephasing of electrons and holes in isotopically purified ZnSe/(Zn,Mg)Se quantum wells

N. E. Kopteva, E. Kirstein, E. A. Zhukov, M. Hussain, A. S. Bhatti, A. Pawlis, D. R. Yakovlev, M. Bayer, and A. Greilich
Phys. Rev. B 100, 205415 – Published 15 November 2019

Abstract

The coherent spin dynamics of resident electrons and holes in an isotopically purified ZnSe/(Zn,Mg)Se single quantum well is investigated in different regimes, requiring corresponding adaption of the applied time-resolved pump-probe Kerr rotation technique. The purification of the Zn and Se atom species in the crystal to the isotopes with zero nuclear spin is expected to lead to an extension of the spin dephasing times of resident carriers, due to the suppression of their interaction with the nuclear spins. Indeed, we find no indication of carrier-nuclear interaction in this sample and link the observed carrier spin relaxation to the spin-orbit interaction. Theoretical considerations support the experimental results.

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  • Received 10 September 2019
  • Revised 28 October 2019

DOI:https://doi.org/10.1103/PhysRevB.100.205415

©2019 American Physical Society

Physics Subject Headings (PhySH)

Quantum Information, Science & TechnologyCondensed Matter, Materials & Applied Physics

Authors & Affiliations

N. E. Kopteva1,2, E. Kirstein2, E. A. Zhukov2,3, M. Hussain4, A. S. Bhatti4, A. Pawlis5, D. R. Yakovlev2,3, M. Bayer2,3, and A. Greilich2

  • 1Spin Optics Laboratory, St. Petersburg State University, Ul'anovskaya 1, Peterhof, St. Petersburg 198504, Russia
  • 2Experimentelle Physik 2, Technische Universität Dortmund, 44221 Dortmund, Germany
  • 3Ioffe Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia
  • 4Center for Micro and Nano Devices (CMND), Department of Physics, COMSATS University Islamabad, Park Road, Islamabad 44000, Pakistan
  • 5Peter Grünberg Institute (PGI-9), Forschungszentrum Jülich, 52425 Jülich, Germany

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Issue

Vol. 100, Iss. 20 — 15 November 2019

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