Structure of exciton condensates in imbalanced electron-hole bilayers
arXiv:1611.09717 · doi:10.1103/PhysRevB.94.174519
Abstract
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 wavefunction 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.
13 pages, 8 figures
References in corpus (6)
- Coulomb Drag in the Exciton Regime in Electron-Hole Bilayers
- Anomalous Coulomb drag in electron-hole bilayers
- Effects of density imbalance on the BCS-BEC crossover in semiconductor electron-hole bilayers
- Superfluidity at the BEC-BCS crossover in two-dimensional Fermi gases with population and mass imbalance
- Supersolidity in electron-hole bilayers with a large density imbalance
- Spinodal decomposition in polarised Fermi superfluids