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Title: Modulated phases of graphene quantum Hall polariton fluids

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.
 [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:
Grant/Contract Number:
FG03-02ER45958; TBF1473; 696656
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 7; Journal ID: ISSN 2041-1723
Nature Publishing Group
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)
Country of Publication:
United States
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; optical properties and devices; polaritons; quantum fluids and solids
OSTI Identifier: