High-temperature superfluidity with indirect excitons in van der Waals heterostructures

Abstract

All known superfluid and superconducting states of condensed matter are enabled by composite bosons (atoms, molecules, Cooper pairs) made of an even number of fermions. Temperatures where such macroscopic quantum phenomena occur are limited by the lesser of the binding energy and the degeneracy temperature of the bosons. High critical temperature cuprate superconductors set the present record of ~100 K. Here we propose a design for artificially structured materials to rival this record. The main elements of the structure are two monolayers of a transition metal dichalcogenide separated by an atomically thin spacer. Electrons and holes generated in the system would accumulate in the opposite monolayers and form bosonic bound states --- the indirect excitons. The resultant degenerate Bose gas of indirect excitons would exhibit macroscopic occupation of a quantum state and vanishing viscosity at high temperatures.

7 pages, 4 figures

References in corpus (11)

• The electronic properties of bilayer graphene
• Strongly correlated 2D quantum phases with cold polar molecules: controlling the shape of the interaction potential
• Room-Temperature Superfluidity in Graphene Bilayers
• Quantum phase transition in a two-dimensional system of dipoles
• Analysis of the exciton-exciton interaction in semiconductor quantum wells
• Electron screening and excitonic condensation in double-layer graphene systems
• Infrared Reflectance Spectrum of BN Calculated from First Principles
• Models of coherent exciton condensation
• Exciton and biexciton energies in bilayer systems
• Biexcitons in two-dimensional systems with spatially separated electrons and holes
• Phase diagram of bilayer electron-hole plasmas

Cited by in corpus (36)

• Observation of Long-Lived Interlayer Excitons in Monolayer MoSe2-WSe2 Heterostructures
• k.p theory for two-dimensional transition metal dichalcogenide semiconductors
• Moiré excitons: from programmable quantum emitter arrays to spin-orbit coupled artificial lattices
• Evidence of high-temperature exciton condensation in 2D atomic double layers
• Subdiffractional focusing and guiding of polaritonic rays in a natural hyperbolic material
• Theory of optical absorption by interlayer excitons in transition metal dichalcogenide heterobilayers
• Ultrafast transition between exciton phases in van der Waals heterostructures
• Excitons versus electron-hole plasma in monolayer transition metal dichalcogenide semiconductors
• Probing the inter-layer exciton physics in a MoS${}_2$/MoSe${}_2$/MoS${}_2$ van der Waals heterostructure
• Directional Interlayer Spin-Valley Transfer in Two-Dimensional Heterostructures
• Interlayer coupling and gate-tunable excitons in transition metal dichalcogenide heterostructures
• Collective Excitations in 2D Materials
• Upconverted electroluminescence via Auger scattering of interlayer excitons in van der Waals heterostructures
• Exciton condensate in bilayer transition metal dichalcogenides: strong coupling regime
• Towards superfluidity of dipolar excitons in a TMDC double layer
• Exciton dynamics in WSe2 bilayers
• Electrically Controlled Two-Dimensional Electron-Hole Fluids
• Electric Field Tuning of Band Offsets in Transition Metal Dichalcogenides
• Two-dimensional Bose gas of tilted dipoles: roton instability and condensate depletion
• Quantum phase transition of a two-dimensional quadrupolar system
• Roton-maxon spectrum and instability for weakly interacting dipolar excitons in a semiconductor layer
• Theory of condensation of indirect excitons in a trap
• Ultrafast charge carrier and exciton dynamics in an excitonic insulator probed by time-resolved photoemission spectroscopy
• Antiferromagnetic ordering and excitonic pairing in the AA-stacked bilayer graphene
• Attraction of indirect excitons in van der Waals heterostructures with three semiconducting layers
• Exciton solid in bilayer two dimensional electron-hole systems
• Anisotropic superfluidity of two-dimensional excitons in a periodic potential
• Spatially indirect excitons in black and blue phosphorene double layers
• Strong-coupling theory of condensate-mediated superconductivity in 2D materials
• Analytical Quantitative Semi-Classical Approach to the LoSurdo-Stark Effect and Ionization in 2D excitons
• Moiré-localized interlayer exciton wavefunctions captured by imaging its electron and hole constituents
• Strong enhancement of third harmonic generation in a double layer graphene system caused by electron-hole pairing
• High-temperature tunable superfluidity of polaritons in Xene monolayers in an optical microcavity
• Electron-hole pair condensation in Graphene/MoS2 heterointerface
• Room temperature interlayer exciton valley polarization and valley Hall effect
• Two-dimensional Ga${}_2$O${}_3$ glass: a large scale passivation and protection material for monolayer WS${}_2$