Phase diagram of bilayer electron-hole plasmas

Abstract

We investigate exciton bound-state formation and crystallization effects in two-dimensional electron-hole bilayers. Performing unbiased path integral Monte Carlo simulations all quantum and Coulomb correlation effects are treated on first principles. We analyze diverse pair distribution functions in dependence on the layer separation, particle density and hole-to-electron mass ratio and derive a schematic phase diagram for the neutral mass-asymmetric bilayer system. Our simulations reveal a great variety of possible phases namely an exciton gas, an exciton crystal, an electron-hole liquid and a hole crystal embedded in an electron gas.

References in corpus (10)

• Excitonic condensation in a symmetric electron-hole bilayer
• Observation of Feshbach resonances in an ultracold gas of ${}^{52}$Cr
• Berezinskii-Kosterlitz-Thouless transition in two-dimensional dipole systems
• Quantum melting of a crystal of dipolar bosons
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• Crystallization of an exciton superfluid
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Cited by in corpus (12)

• High-temperature superfluidity with indirect excitons in van der Waals heterostructures
• Excitons and biexcitons in symmetric electron-hole bilayers
• Attenuating the fermion sign problem in path integral Monte Carlo simulations using the Bogoliubov inequality and thermodynamic integration
• Exact-diagonalization study of exciton condensation in electron bilayers
• Thermodynamics of the quark-gluon plasma at finite chemical potential: color path integral Monte Carlo results
• Attractive and repulsive dipolar interaction in bilayers of indirect excitons
• Fermi edge singularity in neutral electron-hole system
• Attraction of indirect excitons in van der Waals heterostructures with three semiconducting layers
• A complete laboratory for transport studies of electron-hole interactions in GaAs/AlGaAs systems
• Quadriexcitons and excitonic condensate in a symmetric electron-hole bilayer with valley degeneracy
• Energetic comparison of exciton gas versus electron-hole plasma in a bilayer two-dimensional electron-hole system
• Ordered phases in a bilayer system of dipolar fermions