Skyrmion Formation and Optical Spin-Hall Effect in an Expanding Coherent Cloud of Indirect Excitons

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, 584-588 (2012)]. We show that the averaging of the electron and hole orbital motion leads to a comparable spin-orbit interaction for both type 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 polarization pattern as in the optical spin Hall effect despite the different symmetry of the spin-orbit interactions.

References in corpus (4)

• Spin relaxation and decoherence of holes in quantum dots
• Stable Skyrmions in SU(2) Gauged Bose-Einstein Condensates
• Transmutation from Skyrmions to Half-Solitons Driven by the Nonlinear Optical Spin-Hall Effect
• Spin-orbit coupled cold exciton condensates

Cited by in corpus (19)

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• Half-Skyrmion Spin Textures In Polariton Microcavities
• Optical Valley Hall Effect based on Transitional Metal Dichalcogenide cavity polaritons
• Interference dislocations in condensate of indirect excitons
• Effects of fermion exchanges on the polarization of exciton condensates
• Complexes of dipolar excitons in layered quasi-two-dimensional nanostructures
• Ballistic spin transport in exciton gases
• Pancharatnam-Berry phase in condensate of indirect excitons
• Energy levels repulsion by spin-orbit coupling in two-dimensional Rydberg excitons
• Nonlinear Optical Probe of Indirect Excitons
• All optical resonant magnetization switching in ${\text{CrI}}_3$ monolayers
• Chaos in two-dimensional Kepler problem with spin-orbit coupling
• Vortices in spinor cold exciton condensates with spin-orbit interaction
• Spin-dependent coherent transport of two-dimensional excitons
• Hanle model of a spin-orbit coupled Bose-Einstein condensate of excitons in semiconductor quantum wells
• Interference dislocations adjacent to emission spot