Experimental conditions for observation of electron-hole superfluidity in GaAs heterostructures

Abstract

The experimental parameter ranges needed to generate superfluidity in optical and drag experiments in GaAs double quantum wells are determined, using a formalism that includes self-consistent screening of the Coulomb pairing interaction in the presence of the superfluid. The very different electron and hole masses in GaAs make this a particularly interesting system for superfluidity, with exotic superfluid phases predicted in the BCS-BEC crossover regime. We find that the density and temperature ranges for superfluidity cover the range for which optical experiments have observed indications of superfluidity, but that existing drag experiments lie outside the superfluid range. However we also show that for samples with low mobility with no macroscopically connected superfluidity, if the superfluidity survived in randomly distributed localized pockets, standard quantum capacitance measurements could detect these pockets.

arXiv comment7 pages, 4 figures

References in corpus (34)

• Observation of resonance condensation of fermionic atom pairs
• Condensation of Pairs of Fermionic Atoms Near a Feshbach Resonance
• Crossover from a molecular Bose-Einstein condensate to a degenerate Fermi gas
• Evidence of high-temperature exciton condensation in 2D atomic double layers
• Macroscopically ordered state in exciton system
• Evidence for a Goldstone Mode in a Double Layer Quantum Hall System
• High Temperature Superfluidity in Double Bilayer Graphene
• Gate-Tuned Spontaneous Exciton Insulator in Double-Quantum Wells
• Stability Criteria for Breached Pair Superfluidity
• Coulomb Drag in the Exciton Regime in Electron-Hole Bilayers
• The Fulde-Ferrell-Larkin-Ovchinnikov state for ultracold fermions in lattice and harmonic potentials: a review
• Strongly enhanced tunneling at total charge neutrality in double bilayer graphene-WSe${}_2$ heterostructures
• Anomalous Coulomb drag in electron-hole bilayers
• Supersolidity around a critical point in dipolar Bose Einstein condensates
• Drag in paired electron-hole layers
• Plasmon enhancement of Coulomb drag in double quantum well systems
• Vortex-Antivortex Lattice in Ultra-Cold Fermi Gases
• Condensate Fraction of a Fermi Gas in the BCS-BEC Crossover
• Cooper pairing of electrons and holes in graphene bilayer: Correlation effects
• Interaction-Enhanced Coherence Between Two-Dimensional Dirac Layers
• Effects of density imbalance on the BCS-BEC crossover in semiconductor electron-hole bilayers
• Band-edge BCS-BEC crossover in a two-band superconductor: physical properties and detection parameters
• Production of a degenerate Fermi-Fermi mixture of dysprosium and potassium atoms
• Excitonic Superfluidity and Screening in Electron-Hole Bilayer Systems
• Evidence from quantum Monte Carlo of large gap superfluidity and BCS-BEC crossover in double electron-hole layers
• Quantized Vortices and Four-Component Superfluidity of Semiconductor Excitons
• Mixtures of ultracold fermions with unequal masses
• Enhancement effect of mass imbalance on Fulde-Ferrell-Larkin-Ovchinnikov type of pairing in Fermi-Fermi mixtures of ultracold quantum gases
• Universal phase diagram and scaling functions of imbalanced Fermi gases
• Multicomponent screening and superfluidity in gapped electron-hole double bilayer graphene with realistic bands
• High temperature electron-hole superfluidity with strong anisotropic gaps in double phosphorene monolayers
• Tunneling and Fluctuating Electron-Hole Cooper Pairs in Double Bilayer Graphene
• Switching between attractive and repulsive Coulomb-interaction-mediated drag in an ambipolar GaAs/AlGaAs bilayer device
• Comment on "Electron screening and excitonic condensation in double-layer graphene systems"

Cited by in corpus (11)

• Chester supersolid of spatially indirect excitons in double-layer semiconductor heterostructures
• Josephson-like tunnel resonance and large Coulomb drag in GaAs-based electron-hole bilayers
• Three-dimensional electron-hole superfluidity in a superlattice close to room temperature
• Superfluidity of dipolar magnetoexcitons in doped double-layered $\alpha$-${\mathcal{T}}_3$ lattice in a strong magnetic field
• Superfluidity of dipolar excitons in a double layer of $\alpha -T_3$ with a mass term
• Stationary waves in a superfluid gas of electron-hole pairs in bilayers
• Exciton Superfluidity in 2D Heterostructures from First Principles: The importance of material specific screening
• Giant amplification of Berezinskii-Kosterlitz-Thouless transition temperature in superconducting systems characterized by cooperative interplay of small-gapped valence and conduction bands
• Topological hybrid electron-hole Cooper pairing
• Topological fluctuating electron-hole Cooper pairs in graphene-GaAs heterostructures
• Anomalous drag in electron-hole condensates with granulated order