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Condensation of indirect excitons

Published online by Cambridge University Press:  07 May 2020

L.V. Butov
L.V. Butov*
Affiliation:
University of California, San Diego, USA; lvbutov@physics.ucsd.edu
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Abstract

An indirect exciton (IX), also known as an interlayer exciton, is a bound pair of an electron and a hole confined in spatially separated layers. Due to their long lifetimes, IXs can cool below the temperature of quantum degeneracy. This provides an opportunity to experimentally study cold composite bosons. This article overviews our studies of cold IXs, presenting spontaneous coherence and Bose–Einstein condensation of IXs and phenomena observed in the IX condensate, including the spatially ordered exciton state, commensurability effect of exciton density wave, spin textures, Pancharatnam–Berry phase, long-range coherent spin transport, and interference dislocations.

Type
Emergent Quantum Materials
Information
MRS Bulletin , Volume 45 , Issue 5: Emergent Quantum Materials , May 2020 , pp. 380 - 386
Copyright
Copyright © Materials Research Society 2020

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