Crystallization in mass-asymmetric electron-hole bilayers

Abstract

We consider a \textit{mass-asymmetric} electron and hole bilayer. Electron and hole Coulomb correlations and electron and hole quantum effects are treated on first princles by path integral Monte Carlo methods. For a fixed layer separation we vary the mass ratio $M$ of holes and electrons between 1 and 100 and analyze the structural changes in the system. While, for the chosen density, the electrons are in a nearly homogeneous state, the hole arrangement changes from homogeneous to localized, with increasing $M$ which is verified for both, mesoscopic bilayers in a parabolic trap and for a macroscopic system.

10 pages, latex (styles files included)

References in corpus (13)

• Wigner Crystallization in mesoscopic 2D electron systems
• Crossover from Fermi liquid to Wigner molecule behavior in quantum dots
• Excitonic condensation in a symmetric electron-hole bilayer
• Structural properties of screened Coulomb balls
• Crystallization in two-component Coulomb systems
• Influence of well width fluctuations on the binding energy of excitons, charged excitons and biexcitons in GaAs-based quantum wells
• Correlation Induced Inhomogeneity in Circular Quantum Dots
• The 2-D electron gas at arbitrary spin polarizations and arbitrary coupling strengths: Exchange-correlation energies, distribution functions and spin-polarized phases
• Path-integral Monte Carlo simulations for interacting few-electron quantum dots with spin-orbit coupling
• Spin-polarized stable phases of the 2-D electron fluid at finite temperatures
• Three-body crystallization diagrams and the cooling of white dwarfs
• Correlated few-particle states in artificial bipolar molecule
• Dynamic response of artificial bipolar molecules

Cited by in corpus (9)

• Classical and quantum Coulomb crystals
• Dynamics of two-dimensional dipole systems
• Quantum breathing mode of trapped bosons and fermions at arbitrary coupling
• Phase diagram of bilayer electron-hole plasmas
• Structural transitions of finite spherical Yukawa crystals
• Possible effect of collective modes in zero magnetic field transport in an electron-hole bilayer
• Supersolidity in electron-hole bilayers with a large density imbalance
• Effective interaction potential and superfluid-solid transition of spatially indirect excitons
• Nonequilibrium Green's function approach to the pair distribution function of quantum many-body systems out of equilibrium