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Title: Modulated phases of graphene quantum Hall polariton fluids

Abstract

There is a growing experimental interest in coupling cavity photons to the cyclotron resonance excitations of electron liquids in high-mobility semiconductor quantum wells or graphene sheets. These media offer unique platforms to carry out fundamental studies of exciton-polariton condensation and cavity quantum electrodynamics in a regime, in which electron–electron interactions are expected to play a pivotal role. Here, focusing on graphene, we present a theoretical study of the impact of electron–electron interactions on a quantum Hall polariton fluid, that is a fluid of magneto-excitons resonantly coupled to cavity photons. We show that electron–electron interactions are responsible for an instability of graphene integer quantum Hall polariton fluids towards a modulated phase. We demonstrate that this phase can be detected by measuring the collective excitation spectra, which is often at a characteristic wave vector of the order of the inverse magnetic length.

Authors:
 [1];  [1];  [2];  [3]
  1. Istituto Nanoscienze (CNR-NANO), Pisa (Italy). NEST
  2. Univ. of Texas, Austin, TX (United States). Dept. of Physics
  3. Italian Inst. of Technology (IIT), Genoa (Italy). Graphene Labs
Publication Date:
Research Org.:
Univ. of Texas, Austin, TX (United States); Istituto Nanoscienze (CNR-NANO), Pisa (Italy)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); Welch Foundation (United States); European Union (EU); Italian Inst. of Technology (IIT) (Italy)
OSTI Identifier:
1425795
Grant/Contract Number:  
FG03-02ER45958; TBF1473; 696656
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 7; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; optical properties and devices; polaritons; quantum fluids and solids

Citation Formats

Pellegrino, Francesco M. D., Giovannetti, Vittorio, MacDonald, Allan H., and Polini, Marco. Modulated phases of graphene quantum Hall polariton fluids. United States: N. p., 2016. Web. doi:10.1038/ncomms13355.
Pellegrino, Francesco M. D., Giovannetti, Vittorio, MacDonald, Allan H., & Polini, Marco. Modulated phases of graphene quantum Hall polariton fluids. United States. doi:10.1038/ncomms13355.
Pellegrino, Francesco M. D., Giovannetti, Vittorio, MacDonald, Allan H., and Polini, Marco. Mon . "Modulated phases of graphene quantum Hall polariton fluids". United States. doi:10.1038/ncomms13355. https://www.osti.gov/servlets/purl/1425795.
@article{osti_1425795,
title = {Modulated phases of graphene quantum Hall polariton fluids},
author = {Pellegrino, Francesco M. D. and Giovannetti, Vittorio and MacDonald, Allan H. and Polini, Marco},
abstractNote = {There is a growing experimental interest in coupling cavity photons to the cyclotron resonance excitations of electron liquids in high-mobility semiconductor quantum wells or graphene sheets. These media offer unique platforms to carry out fundamental studies of exciton-polariton condensation and cavity quantum electrodynamics in a regime, in which electron–electron interactions are expected to play a pivotal role. Here, focusing on graphene, we present a theoretical study of the impact of electron–electron interactions on a quantum Hall polariton fluid, that is a fluid of magneto-excitons resonantly coupled to cavity photons. We show that electron–electron interactions are responsible for an instability of graphene integer quantum Hall polariton fluids towards a modulated phase. We demonstrate that this phase can be detected by measuring the collective excitation spectra, which is often at a characteristic wave vector of the order of the inverse magnetic length.},
doi = {10.1038/ncomms13355},
journal = {Nature Communications},
number = ,
volume = 7,
place = {United States},
year = {2016},
month = {11}
}

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