Supersolid Helium at High Pressure

Abstract

We have measured the pressure dependence of the supersolid fraction by a torsional oscillator technique. Superflow is found from 25.6 bar up to 136.9 bar. The supersolid fraction in the low temperature limit increases from 0.6 % at 25.6 bar near the melting boundary up to a maximum of 1.5% near 55 bar before showing a monotonic decrease with pressure extrapolating to zero near 170 bar.

4 pages, 4 figures

References in corpus (3)

• On the Supersolid State of Matter
• Ring exchanges and the supersolid phase of 4He
• Superfluid Interfaces in Quantum Solids

Cited by in corpus (59)

• The physics of dipolar bosonic quantum gases
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• Metastable states of a gas of dipolar bosons in a 2D optical lattice
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• Observation of Unusual Mass Transport in Solid hcp 4He
• What makes a crystal supersolid ?
• Nonclassical Rotational Inertia in Single Crystal Helium
• Pair-supersolid phase in a bilayer system of dipolar lattice bosons
• On the origin of the decrease in the torsional oscillator period of solid He4
• Coexisting ordinary elasticity and superfluidity in a model of defect-free supersolid
• The effect of 3He impurities on the nonclassical response to oscillation of solid 4He
• A Gross-Pitaevskii Treatment for Supersolid He
• Entropy of solid He4: the possible role of a dislocation glass
• Supersolidity from defect-condensation in the extended boson Hubbard model
• Observation of Mass Transport through Solid 4He
• Thermal History of Solid 4He Under Oscillation
• Solid 4He and the Supersolid Phase: from Theoretical Speculation to the Discovery of a New State of Matter? A Review of the Past and Present Status of Research
• Vortex Fluid State below an Onset Temperature T_0 of Solid 4He
• Non-linear Elastic Response in Solid Helium: critical velocity or strain
• Bose-Einstein Condensate in Solid Helium
• Non Classical Rotational Inertia Fraction in a One Dimensional Model of Supersolid
• Viscoelastic Behavior of Solid ${}^4$He
• Search for Superfluidity in Solid Hydrogen
• Binding of a 3He impurity to a screw dislocation in solid 4He
• Nonclassical rotational inertia for a supersolid under rotation
• Melting curve of ${}^4$He: no sign of the supersolid transition down to 10 mK
• Supersolids in confined fermions on one-dimensional optical lattices
• Minimal Model for Disorder-induced Missing Moment of Inertia in Solid ${}^4$He
• Mesoscopic supersolid of dipoles in a trap
• The glassy response of solid He-4 to torsional oscillations
• Absence of low temperature anomaly on the melting curve of ${}^4$He
• A glassy contribution to the heat capacity of hcp ${}^4$He solids
• Properties of Vacancy Formation in He-4 hcp Crystals at Zero Temperature and Fixed Pressure
• A glass anomaly in the shear modulus of solid ${}^4$He
• Zero-point vacancies in quantum solids
• Quantum dislocations: the fate of multiple vacancies in two dimensional solid 4He
• Anharmonicity Induced Supersolidity In Spin-Orbit Coupled Bose-Einstein Condensates
• Relaxation of superflow in a network: an application to the dislocation model of supersolidity of helium crystals
• Josephson effects in one-dimensional supersolids
• Dissipation peak as an indicator of sample inhomogeneity in solid ${}^4$He oscillator experiments
• Classification of a supersolid: Trial wavefunctions, Symmetry breakings and Excitation spectra
• Possible role of 3He impurities in solid 4He
• Finite size Berezinski-Kosterlitz-Thouless transition at grain boundaries in solid ${}^4$He and role of ${}^3$He impurities
• Excitations of amorphous solid helium
• Anomalous supersolidity in a weakly interacting dipolar Bose mixture on a square lattice
• Zero-temperature study of vacancies in solid 4He
• Tunnelling defect nanoclusters in hcp 4He crystals: alternative to supersolidity
• Effect of Rotation on Elastic Moduli of Solid ${}^4$He
• Non-classical Rotational Inertia in a Two-dimensional Bosonic Solid Containing Grain Boundaries
• Study of solid 4He in two dimensions. The issue of zero-point defects and study of confined crystal
• Bose-Einstein condensation in a decorated lattice: an application to supersolid
• Hydrodynamics of superfluids confined in blocked rings and wedges
• Superfluid weight and polarization amplitude in the one-dimensional bosonic Hubbard model
• Frustration-Induced Supersolid Phases of Extended Bose-Hubbard Model in the Hard-Core Limit
• Phase diagram and crystal melting of helium-4 in two dimensions
• Quantized vortex state in hcp solid 4He
• Monte Carlo Simulations of an Extended Feynman-Kikuchi Model
• Shear Modulus of an Elastic Solid under External Pressure as a function of Temperature: The case of Helium
• The role of glass dynamics in the anomaly of the dielectric function of solid helium