Crescent states in charge-imbalanced polariton condensates

Artem Strashko; Francesca M. Marchetti; Allan H. MacDonald; Jonathan Keeling

doi:10.1103/PhysRevLett.125.067405

Crescent states in charge-imbalanced polariton condensates

Artem Strashko, Francesca M. Marchetti, Allan H. MacDonald, Jonathan Keeling

Research output: Contribution to journal › Article › peer-review

Abstract

We study two-dimensional charge-imbalanced electron-hole systems embedded in an optical microcavity. We find that strong coupling to photons favors states with pairing at zero or small center of mass momentum, leading to a condensed state with spontaneously broken time-reversal and rotational symmetry, and unpaired carriers that occupy an anisotropic crescent-shaped sliver of momentum space. The crescent state is favoured at moderate charge imbalance, while a Fulde–Ferrel–Larkin–Ovchinnikov-like state — with pairing at large center of mass momentum — occurs instead at strong imbalance. The crescent state stability results from long-range Coulomb interactions in combination with extremely long-range photon-mediated interactions.

Original language	English
Article number	067405
Number of pages	7
Journal	Physical Review Letters
Volume	125
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevLett.125.067405
Publication status	Published - 7 Aug 2020

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10.1103/PhysRevLett.125.067405

PhysRevLett.125.067405
Copyright © 2020 American Physical Society. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the final published version of the work, which was originally published at https://doi.org/10.1103/PhysRevLett.125.067405.
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@article{405885f29bc842f1897b9d23fbeb98ca,

title = "Crescent states in charge-imbalanced polariton condensates",

abstract = "We study two-dimensional charge-imbalanced electron-hole systems embedded in an optical microcavity. We find that strong coupling to photons favors states with pairing at zero or small center of mass momentum, leading to a condensed state with spontaneously broken time-reversal and rotational symmetry, and unpaired carriers that occupy an anisotropic crescent-shaped sliver of momentum space. The crescent state is favoured at moderate charge imbalance, while a Fulde–Ferrel–Larkin–Ovchinnikov-like state — with pairing at large center of mass momentum — occurs instead at strong imbalance. The crescent state stability results from long-range Coulomb interactions in combination with extremely long-range photon-mediated interactions.",

author = "Artem Strashko and Marchetti, {Francesca M.} and MacDonald, {Allan H.} and Jonathan Keeling",

note = "Funding: AS acknowledges support from the EPSRC CM-CDT (EP/L015110/1) and a travel award from the Scottish Universities Physics Alliance. AS, AHM and JK acknowledge financial support from a Royal Society International Exchange Award, IES\R2\170213. FMM acknowledges financial support from the Spanish Ministry of Science and Innovation through the project No. MAT2017-83772-R and the “Mar{\'i}a de Maeztu” Programme for Units of Excellence in R&D (CEX2018-000805-M). JK acknowledges financial support from EPSRC program “Hybrid Polaritonics” (EP/M025330/1). AHM acknowledges support from Army Research Office (ARO) Grant # W911NF-17-1-0312 (MURI). This work was performed in part at Aspen Center for Physics, which is supported by National Science Foundation grant PHY-1607611 and partially supported by a grant from the Simons Foundation.",

year = "2020",

month = aug,

day = "7",

doi = "10.1103/PhysRevLett.125.067405",

language = "English",

volume = "125",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

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T1 - Crescent states in charge-imbalanced polariton condensates

AU - Strashko, Artem

AU - Marchetti, Francesca M.

AU - MacDonald, Allan H.

AU - Keeling, Jonathan

N1 - Funding: AS acknowledges support from the EPSRC CM-CDT (EP/L015110/1) and a travel award from the Scottish Universities Physics Alliance. AS, AHM and JK acknowledge financial support from a Royal Society International Exchange Award, IES\R2\170213. FMM acknowledges financial support from the Spanish Ministry of Science and Innovation through the project No. MAT2017-83772-R and the “María de Maeztu” Programme for Units of Excellence in R&D (CEX2018-000805-M). JK acknowledges financial support from EPSRC program “Hybrid Polaritonics” (EP/M025330/1). AHM acknowledges support from Army Research Office (ARO) Grant # W911NF-17-1-0312 (MURI). This work was performed in part at Aspen Center for Physics, which is supported by National Science Foundation grant PHY-1607611 and partially supported by a grant from the Simons Foundation.

PY - 2020/8/7

Y1 - 2020/8/7

N2 - We study two-dimensional charge-imbalanced electron-hole systems embedded in an optical microcavity. We find that strong coupling to photons favors states with pairing at zero or small center of mass momentum, leading to a condensed state with spontaneously broken time-reversal and rotational symmetry, and unpaired carriers that occupy an anisotropic crescent-shaped sliver of momentum space. The crescent state is favoured at moderate charge imbalance, while a Fulde–Ferrel–Larkin–Ovchinnikov-like state — with pairing at large center of mass momentum — occurs instead at strong imbalance. The crescent state stability results from long-range Coulomb interactions in combination with extremely long-range photon-mediated interactions.

AB - We study two-dimensional charge-imbalanced electron-hole systems embedded in an optical microcavity. We find that strong coupling to photons favors states with pairing at zero or small center of mass momentum, leading to a condensed state with spontaneously broken time-reversal and rotational symmetry, and unpaired carriers that occupy an anisotropic crescent-shaped sliver of momentum space. The crescent state is favoured at moderate charge imbalance, while a Fulde–Ferrel–Larkin–Ovchinnikov-like state — with pairing at large center of mass momentum — occurs instead at strong imbalance. The crescent state stability results from long-range Coulomb interactions in combination with extremely long-range photon-mediated interactions.

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VL - 125

JO - Physical Review Letters

JF - Physical Review Letters

IS - 6

M1 - 067405

ER -

Crescent states in charge-imbalanced polariton condensates

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Jonathan Keeling - RS: Strong matter-light coupling with tunably doped two-dimensional materials

Hybrid Polaritonics: Hybrid Polaritonics

Data Underpinning: Crescent states in charge-imbalanced polariton condensates

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Crescent states in charge-imbalanced polariton condensates

Abstract

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Projects

Jonathan Keeling - RS: Strong matter-light coupling with tunably doped two-dimensional materials

Hybrid Polaritonics: Hybrid Polaritonics

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Data Underpinning: Crescent states in charge-imbalanced polariton condensates

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