Chester supersolid of spatially indirect excitons in double-layer semiconductor heterostructures

Abstract

A supersolid, a counter-intuitive quantum state in which a rigid lattice of particles flows without resistance, has to date not been unambiguously realised. Here we reveal a supersolid ground state of excitons in a double-layer semiconductor heterostructure over a wide range of layer separations outside the focus of recent experiments. This supersolid conforms to the original Chester supersolid with one exciton per supersolid site, as distinct from the alternative version reported in cold-atom systems of a periodic modulation of the superfluid density. We provide the phase diagram augmented by the supersolid. This new phase appears at layer separations much smaller than the predicted exciton normal solid, and it persists up to a solid--solid transition where the quantum phase coherence collapses. The ranges of layer separations and exciton densities in our phase diagram are well within reach of the current experimental capabilities.

References in corpus (8)

• Transient supersolid properties in an array of dipolar quantum droplets
• Supersolid hardcore bosons on the triangular lattice
• Strongly correlated excitonic insulator in atomic double layers
• Quantum phase transition in a two-dimensional system of dipoles
• Wigner supersolid of excitons in electron-hole bilayers
• Quantum melting of a crystal of dipolar bosons
• Superfluidity versus localization in bulk 4He at zero temperature
• Stationary waves in a superfluid gas of electron-hole pairs in bilayers

Cited by in corpus (16)

• Sub-unity superfluid fraction of a supersolid from self-induced Josephson effect
• Strong-coupling phases of trions and excitons in electron-hole bilayers at commensurate densities
• Keldysh field theory of dynamical exciton condensation transitions in nonequilibrium electron-hole bilayers
• Evidence for a Superfluid-to-solid Transition of Bilayer Excitons
• Eliashberg theory for dynamical screening in bilayer exciton condensation
• Excitonic insulators and superfluidity in 2D bilayers without external fields
• Temperature-induced supersolidity in spin-orbit-coupled Bose gases
• Spin susceptibility in interacting two-dimensional semiconductors and bilayer systems at first order: Kohn anomalies and spin density wave ordering
• Dipole-mode and scissors-mode oscillations of a dipolar supersolid
• Striped excitonic (super)solid in anisotropic semiconductors with screened exciton interactions
• The electronic structure of intrinsic magnetic topological insulator MnBi2Te4 quantum wires
• Quantum exciton solid with embedded electron-hole solids in double-layer WSe2
• Low-temperature Depletion of Superfluid Density in the Absence of Galilean Symmetry
• Self-Ordered Supersolid in Spinor Condensates with Cavity-Mediated Spin-Momentum-Mixing Interactions
• Beyond Random Phase Approximation in electron-hole bilayer superfluidity
• Correlated phases of moat-band excitons in two dimensions