Spontaneous and superfluid chiral edge states in exciton-polariton condensates
Spontaneous and superfluid chiral edge states in exciton-polariton condensates
We present a scheme of interaction-induced topological band structures based on the spin anisotropy of exciton-polaritons in semiconductor microcavities. We predict theoretically that this scheme allows the engineering of topological gaps, without requiring a magnetic field or strong spin-orbit interaction (transverse electric-transverse magnetic splitting). Under nonresonant pumping we find that an initially topologically trivial system undergoes a topological transition upon the spontaneous breaking of phase symmetry associated with polariton condensation. Under either nonresonant or resonant coherent pumping we find that it is also possible to engineer a topological dispersion that is linear in wave vector—a property associated with polariton superfluidity.
Sigurdsson, H.
c77d1ecc-45b3-4b54-ab00-4707a2a6c745
Li, G.
812e6532-3890-4b72-a53b-824008836a78
Liew, T.C.H.
293a2372-69e9-4ca4-b616-c8694c9a3812
September 2017
Sigurdsson, H.
c77d1ecc-45b3-4b54-ab00-4707a2a6c745
Li, G.
812e6532-3890-4b72-a53b-824008836a78
Liew, T.C.H.
293a2372-69e9-4ca4-b616-c8694c9a3812
Sigurdsson, H., Li, G. and Liew, T.C.H.
(2017)
Spontaneous and superfluid chiral edge states in exciton-polariton condensates.
Physical Review B, 96 (11), [115453].
(doi:10.1103/PhysRevB.96.115453).
Abstract
We present a scheme of interaction-induced topological band structures based on the spin anisotropy of exciton-polaritons in semiconductor microcavities. We predict theoretically that this scheme allows the engineering of topological gaps, without requiring a magnetic field or strong spin-orbit interaction (transverse electric-transverse magnetic splitting). Under nonresonant pumping we find that an initially topologically trivial system undergoes a topological transition upon the spontaneous breaking of phase symmetry associated with polariton condensation. Under either nonresonant or resonant coherent pumping we find that it is also possible to engineer a topological dispersion that is linear in wave vector—a property associated with polariton superfluidity.
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Accepted/In Press date: 19 September 2017
e-pub ahead of print date: 29 September 2017
Published date: September 2017
Identifiers
Local EPrints ID: 415916
URI: http://eprints.soton.ac.uk/id/eprint/415916
ISSN: 2469-9969
PURE UUID: 7361f2d9-37f2-42f5-badf-31068c6a9a7f
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Date deposited: 28 Nov 2017 17:31
Last modified: 15 Mar 2024 16:59
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Contributors
Author:
H. Sigurdsson
Author:
G. Li
Author:
T.C.H. Liew
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