Three-dimensional electron-hole superfluidity in a superlattice close to room temperature

Abstract

Although there is strong theoretical and experimental evidence for electron-hole superfluidity in separated sheets of electrons and holes at low $T$, extending superfluidity to high $T$ is limited by strong 2D fluctuations and Kosterlitz-Thouless effects. We show this limitation can be overcome using a superlattice of alternating electron- and hole-doped semiconductor monolayers. The superfluid transition in a 3D superlattice is not topological, and for strong electron-hole pair coupling, the transition temperature $T_c$ can be at room temperature. As a quantitative illustration, we show $T_c$ can reach $270$ K for a superfluid in a realistic superlattice of transition metal dichalcogenide monolayers.

arXiv comment5 pages, 3 figures, supplementary material (3 pages) includes 1 table and 1 figure

References in corpus (27)

• Coupled spin and valley physics in monolayers of MoS2 and other group-VI dichalcogenides
• Observation of Long-Lived Interlayer Excitons in Monolayer MoSe2-WSe2 Heterostructures
• Observation of resonance condensation of fermionic atom pairs
• Electron-Electron Interactions in Graphene: Current Status and Perspectives
• Theory of Neutral and Charged Excitons in Monolayer Transition Metal Dichalcogenides
• Evidence of high-temperature exciton condensation in 2D atomic double layers
• Large spin splitting in the conduction band of transition metal dichalcogenide monolayers
• Magnetoelectric effects and valley controlled spin quantum gates in transition metal dichalcogenide bilayers
• Room-Temperature Superfluidity in Graphene Bilayers
• High Temperature Superfluidity in Double Bilayer Graphene
• Pseudogap and spectral function from superconducting fluctuations to the bosonic limit
• Interlayer coupling in commensurate and incommensurate bilayer structures of transition metal dichalcogenides
• Bulk and Collective Properties of a Dilute Fermi Gas in the BCS-BEC Crossover
• Strongly enhanced tunneling at total charge neutrality in double bilayer graphene-WSe${}_2$ heterostructures
• Critical Temperature Curve in the BEC-BCS Crossover
• Condensate Fraction of a Fermi Gas in the BCS-BEC Crossover
• Cooper pairing of electrons and holes in graphene bilayer: Correlation effects
• Effects of density imbalance on the BCS-BEC crossover in semiconductor electron-hole bilayers
• Evidence from quantum Monte Carlo of large gap superfluidity and BCS-BEC crossover in double electron-hole layers
• Confined Coherence in Strongly Correlated Anisotropic Metals
• Fermi gas throughout the BCS-BEC crossover: Comparative study of t-matrix approaches with various degrees of self-consistency
• Extracting the condensate density from projection experiments with Fermi gases
• Experimental conditions for observation of electron-hole superfluidity in GaAs heterostructures
• A doping-dependent switch from one- to two-component superfluidity at temperature above 100K in coupled electron-hole Van der Waals heterostructures
• Tunneling and Fluctuating Electron-Hole Cooper Pairs in Double Bilayer Graphene
• The extended Lawrence-Doniach model: the temperature evolution of the in-plane magnetic field anisotropy
• Anisotropic Ginzburg-Landau and Lawrence-Doniach Models for Layered Ultracold Fermi Gases

Cited by in corpus (5)

• Excitonic Condensate in Flat Valence and Conduction Bands of Opposite Chirality
• Magnetoexcitons in transition-metal dichalcogenides monolayers, bilayers, and van der Waals heterostructures
• On superfluidity of indirect excitons in transition metals trichalcogenides van der Waals heterostructures
• Boron Content and the Superconducting Critical Temperature of Carbon-Based Materials
• Collective excitations and quantum incompressibility in electron-hole bilayers