Skyrmion formation and optical spin-hall effect in an expanding coherent cloud of indirect excitons

D. V. Vishnevsky, H. Flayac, A. V. Nalitov, D. D. Solnyshkov, N. A. Gippius, G. Malpuech

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

We provide a theoretical description of the polarization pattern and phase singularities experimentally evidenced recently in a condensate of indirect excitons [H. High et al., Nature 483, 584 (2012)]. We show that the averaging of the electron and hole orbital motion leads to a comparable spin-orbit interaction for both types of carriers. We demonstrate that the interplay between a radial coherent flux of bright indirect excitons and the Dresselhaus spin-orbit interaction results in the formation of spin domains and of topological defects similar to Skyrmions. We reproduce qualitatively all the features of the experimental data and obtain a polarization pattern as in the optical spin-Hall effect despite the different symmetry of the spin-orbit interactions.

Original languageEnglish
Article number246404
JournalPhysical Review Letters
Volume110
Issue number24
DOIs
Publication statusPublished - 12 Jun 2013
Externally publishedYes

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