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Superconductivity in semiconductor structures: the excitonic mechanism

Superconductivity in semiconductor structures: the excitonic mechanism
Superconductivity in semiconductor structures: the excitonic mechanism
We theoretically study the dependency of the superconductivity transition critical temperature (TC) on the electron and exciton–polariton densities in layered systems, where superconductivity is mediated by a Bose-Einstein condensate of exciton–polaritons. The critical temperature increases with the polariton density, but decreases with the electron gas density, surprisingly. This makes doped semiconductor structures with shallow Fermi energies better adapted for observation of the exciton–polariton-induced superconductivity than metallic layers. For realistic GaAs-based microcavities containing doped and neutral quantum wells we estimate TCTC as close to 50 K. Superconductivity is suppressed by magnetic fields of the order of 4 T due to the Fermi surface renormalization.
2D semiconductors, excitons, bose–einstein condensates, superconductivity
1096-3677
170-175
Cherotchenko, E.D.
0187efe7-53e5-4844-877b-4662fa1e614a
Espinosa-Ortega, T.
58e93a89-f190-4905-bed3-60aef0c87724
Nalitov, A.V.
3bc0fc10-7645-44e3-b8be-ca4114104680
Shelykh, I.A.
7dad78b3-4681-410a-abf2-39f3bb16c41f
Kavokin, A.V.
70ffda66-cfab-4365-b2db-c15e4fa1116b
Cherotchenko, E.D.
0187efe7-53e5-4844-877b-4662fa1e614a
Espinosa-Ortega, T.
58e93a89-f190-4905-bed3-60aef0c87724
Nalitov, A.V.
3bc0fc10-7645-44e3-b8be-ca4114104680
Shelykh, I.A.
7dad78b3-4681-410a-abf2-39f3bb16c41f
Kavokin, A.V.
70ffda66-cfab-4365-b2db-c15e4fa1116b

Cherotchenko, E.D., Espinosa-Ortega, T., Nalitov, A.V., Shelykh, I.A. and Kavokin, A.V. (2016) Superconductivity in semiconductor structures: the excitonic mechanism. Superlattices and Microstructures, 90, 170-175. (doi:10.1016/j.spmi.2015.12.003).

Record type: Article

Abstract

We theoretically study the dependency of the superconductivity transition critical temperature (TC) on the electron and exciton–polariton densities in layered systems, where superconductivity is mediated by a Bose-Einstein condensate of exciton–polaritons. The critical temperature increases with the polariton density, but decreases with the electron gas density, surprisingly. This makes doped semiconductor structures with shallow Fermi energies better adapted for observation of the exciton–polariton-induced superconductivity than metallic layers. For realistic GaAs-based microcavities containing doped and neutral quantum wells we estimate TCTC as close to 50 K. Superconductivity is suppressed by magnetic fields of the order of 4 T due to the Fermi surface renormalization.

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Accepted/In Press date: 9 December 2015
e-pub ahead of print date: 12 December 2015
Published date: February 2016
Keywords: 2D semiconductors, excitons, bose–einstein condensates, superconductivity
Organisations: Physics & Astronomy

Identifiers

Local EPrints ID: 385662
URI: http://eprints.soton.ac.uk/id/eprint/385662
ISSN: 1096-3677
PURE UUID: 1bf62636-0a63-41f5-ae43-fa150b8b2486

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Date deposited: 19 Jan 2016 16:31
Last modified: 20 Nov 2021 23:24

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Contributors

Author: E.D. Cherotchenko
Author: T. Espinosa-Ortega
Author: A.V. Nalitov
Author: I.A. Shelykh
Author: A.V. Kavokin

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