Structure of exciton condensates in imbalanced electron-hole bilayers

Article

关键词: BOSE-EINSTEIN CONDENSATION;    LARKIN-OVCHINNIKOV STATE;    EXCHANGE FIELD;    SUPERCONDUCTIVITY;    POLARITONS;   

DOI  :  10.1103/PhysRevB.94.174519

来源: SCIE

【 摘 要 】

We investigate the possibility of excitonic superfluidity in electron-hole bilayers. We calculate the phase diagram of the system for the whole range of electron-hole density imbalance and for different degrees of electrostatic screening, using mean-field theory and a Ginzburg-Landau expansion. We are able to resolve differences on previous work in the literature which concentrated on restricted regions of the parameter space. We also give detailed descriptions of the pairing wave function in the Fulde-Ferrell-Larkin-Ovchinnikov paired state. The Ginzburg-Landau treatment allows us to investigate the energy scales involved in the pairing state and discuss the possible spontaneous breaking of two-dimensional translation symmetry in the ground state.

【 授权许可】

Free