Mechanism of ultrafast spin-polarization switching in nanostructures

V. N. Mantsevich, I. V. Rozhansky, N. S. Maslova, P. I. Arseyev, N. S. Averkiev, and E. Lähderanta
Phys. Rev. B 99, 115307 – Published 11 March 2019

Abstract

We consider time-dependent processes in the optically excited hybrid system formed by a quantum well (QW) coupled to a remote spin-split correlated bound state. The spin-dependent tunneling from the QW to the bound state results in the nonequilibrium electron spin polarization in the QW. The Coulomb correlations at the bound state enhance the spin polarization in the QW. We propose a mechanism for ultrafast switching of the spin polarization in the QW by tuning the laser pulse frequency between the bound state spin sublevels. Mn-doped core/multishell nanoplatelets and hybrid bound state-semiconductor heterostructures are suggested as promising candidates to prove the predicted effect experimentally. The obtained results open a possibility for spin polarization control in nanoscale systems.

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  • Received 16 November 2018
  • Revised 21 February 2019

DOI:https://doi.org/10.1103/PhysRevB.99.115307

©2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

V. N. Mantsevich1, I. V. Rozhansky2,3, N. S. Maslova1, P. I. Arseyev4,5, N. S. Averkiev2,3, and E. Lähderanta3

  • 1Lomonosov Moscow State University, Quantum Technology Center, Physics Department, 119991 Moscow, Russia
  • 2Ioffe Institute, St. Petersburg, 194021, Russia
  • 3Lappeenranta University of Technology, FI-53851 Lappeenranta, Finland
  • 4P.N. Lebedev Physical Institute RAS, 119991 Moscow, Russia
  • 5Russia National Research University Higher School of Economics, 119991 Moscow, Russia

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Issue

Vol. 99, Iss. 11 — 15 March 2019

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