Superfluidity of a rarefied gas of electron-hole pairs in a bilayer system
arXiv:1608.00898 · doi:10.1063/1.4963329
Abstract
The conditions of stability of the superfluid phase in double layer systems with pairing of spatially separated electrons and holes in the low density limit are studied. The general expression for the collective excitation spectrum is obtained. It is shown that under increase in the distance between the layers the minimum emerges in the excitation spectrum. When d reaches the critical value the superfluid state becomes unstable relative to the formation of a kind of the Wigner crystal state. The same instability occurs at fixed d under increase in the density of carries. It is established that the critical distance and the critical density are related to each other by the inverse power function. The impact of the impurities on the temperature of the superfluid transition is investigated. The impact is found weak at the impurity concentration smaller than the density of the pairs. It is shown that in the rarefied system the critical temperature T_c = 100 K can be reached.
References in corpus (32)
- Spontaneous Inter-layer Coherence in Double-Layer Quantum-Hall Systems I: Charged Vortices and Kosterlitz-Thouless Phase Transitions
- Evidence for a Goldstone Mode in a Double Layer Quantum Hall System
- Strong Coulomb drag and broken symmetry in double-layer graphene
- Room-Temperature Superfluidity in Graphene Bilayers
- Counterflow measurements in strongly correlated GaAs hole bilayers: evidence for electron-hole pairing
- Vanishing Hall Resistance at High Magnetic Field in a Double Layer Two-Dimensional Electron System
- Exciton Condensation and Perfect Coulomb Drag
- Observation of a Linearly Dispersing Collective Mode in a Quantum Hall Ferromagnet
- Analysis of the exciton-exciton interaction in semiconductor quantum wells
- Coulomb Drag in the Exciton Regime in Electron-Hole Bilayers
- Excitonic condensation of massless fermions in graphene bilayers
- Electron screening and excitonic condensation in double-layer graphene systems
- Theory of Two-Dimensional Spatially Indirect Equilibrium Exciton Condensates
- Anomalous Coulomb drag in electron-hole bilayers
- Activated Transport in the individual Layers that form the =1 Exciton Condensate
- Electron-hole pairing in graphene-GaAs heterostructures
- Cooper pairing of electrons and holes in graphene bilayer: Correlation effects
- Interaction-Enhanced Coherence Between Two-Dimensional Dirac Layers
- Exciton-exciton interaction and biexciton formation in bilayer systems
- Excitonic condensation in a double-layer graphene system
- Vortices, zero modes and fractionalization in bilayer-graphene exciton condensate
- Exciton and biexciton energies in bilayer systems
- Microscopic Functional Integral Theory of Quantum Fluctuations in Double-Layer Quantum Hall Ferromagnets
- Biexcitons in two-dimensional systems with spatially separated electrons and holes
- Evidence for a finite temperature phase transition in a bilayer quantum Hall system
- Probing the topological exciton condensate via Coulomb drag
- Graphene Bilayer Structures with Superfluid Magnetoexcitons
- On the electric activity of superfluid systems
- Dynamic equation for quantum Hall bilayers with spontaneous interlayer coherence: The low-density limit
- Superconductivity of electron-hole pairs in a bilayer graphene system in a quantizing magnetic field
- Critical velocities in two-component superfluid Bose gases
- Superfluidity of electron-hole pairs in randomly inhomogeneous bilayer systems
Cited by in corpus (5)
- Transition to a supersolid phase in a two-dimensional dilute gas of electron-hole pairs
- Stationary waves in a superfluid gas of electron-hole pairs in bilayers
- Spin-orbit coupled depairing of a dipolar biexciton superfluid
- Anderson-Bogoliubov and Carlson-Goldman modes in counterflow superconductors: Case study of a double monolayer graphene
- Longitudinal Josephson effect in systems with pairing of spatially separated electrons and holes