Excitonic phases in a spatially separated electron-hole ladder model

Abstract

We obtain the numerical ground state of a one-dimensional ladder model with the upper and lower chains occupied by spatially-separated electrons and holes, respectively. Under charge neutrality, we find that the excitonic bound states are always formed, i.e., no finite regime of decoupled electron and hole plasma exists at zero temperature. The system either behaves like a bosonic liquid or a bosonic crystal depending on the inter-chain attractive and intra-chain repulsive interaction strengths. We also provide the detailed excitonic phase diagrams in the intra- and inter-chain interaction parameters, with and without disorder. We also comment on the corresponding two-dimensional electron-hole bilayer exciton condensation.

arXiv comment8 pages + 7 figures

References in corpus (17)

• The ITensor Software Library for Tensor Network Calculations
• Evidence of high-temperature exciton condensation in 2D atomic double layers
• Exciton condensate in semiconductor quantum well structures.
• Strongly correlated excitonic insulator in atomic double layers
• Theory of Two-Dimensional Spatially Indirect Equilibrium Exciton Condensates
• Excitonic condensation in systems of strongly correlated electrons
• Crossover between Strongly-coupled and Weakly-coupled Exciton Superfluids
• Effects of disorder on two strongly correlated coupled chains
• Magnetic properties and spin waves of bilayer magnets in a uniform field
• Exact-diagonalization study of exciton condensation in electron bilayers
• Determinant quantum Monte Carlo study of exciton condensation in the bilayer Hubbard model
• Precursors to Exciton Condensation in Quantum Hall Bilayers
• Exciton condensation in strongly correlated electron bilayers
• Superfluidity and Density Order in a Bilayer Extended Hubbard Model
• Josephson-like tunnel resonance and large Coulomb drag in GaAs-based electron-hole bilayers
• Accurate localization of Kosterlitz-Thouless-type quantum phase transitions for one-dimensional spinless fermions
• Correlated insulator in two Coulomb-coupled quantum wires

Cited by in corpus (4)

• Exciton transport in a germanium quantum dot ladder
• Evidence for a Superfluid-to-solid Transition of Bilayer Excitons
• Energetic comparison of exciton gas versus electron-hole plasma in a bilayer two-dimensional electron-hole system
• 2D bilayer electron-hole superfluidity with unequal and anisotropic masses