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Regular version of the site

Article

Mechanism of ultrafast spin-polarization switching in nanostructures

Physical Review B: Condensed Matter and Materials Physics. 2019. Vol. 99. P. 115307-1-115307-6.
Arseyev P., Maslova N., Mantsevich V., Rozhansky I. V., Averkiev N. S., Lähderanta E.

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