Effective interaction potential and superfluid-solid transition of spatially indirect excitons

Abstract

Using an adiabatic approximation we derive an effective interaction potentially for spatially indirect excitons. Using this potential and path integral Monte Carlo simulations we study exciton crystllization and the quantum melting phase transition in a macroscopic system of 2D excitons. Furthermore, the superfluid fraction is calculated as a function of density and shown to vanish upon crystallization. We show that the commonly used dipole model fails to correctly describe indirect excitons in quantum well structures.

References in corpus (7)

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• Superglass Phase of Helium-four
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Cited by in corpus (6)

• Berezinskii-Kosterlitz-Thouless transition in two-dimensional dipole systems
• Crystallization of an exciton superfluid
• Correlational Origin of the Roton Minimum
• Nonequilibrium Green's function approach to the pair distribution function of quantum many-body systems out of equilibrium
• Quantum metric driven transition between superfluid and incoherent fluid
• Path Integral Monte Carlo Simulations of liquid ${}^3$He without Fixed Nodes: Structural Properties and Collective Excitations