Absence of low temperature anomaly on the melting curve of ${}^4$He

Abstract

We have measured the melting pressure and pressure in the liquid at constant density of ultra-pure ${}^4$He (0.3 ppb of ${}^3$He impurities) with the accuracy of about 0.5 $\mu$bar in the temperature range from 10 to 320 mK. Our measurements show that the anomaly on the melting curve below 80 mK which we have recently observed is entirely due to an anomaly in the elastic modulus of Be-Cu from which our pressure gauge is made of. We thus conclude that the melting pressure of ${}^4$He follows the $T^4$ law due to phonons in the whole temperature range from 10 to 320 mK without any sign of a supersolid transition.

Published in JETP Letters, vol. 85, issue 9, page 555-558 (2007); 4 pages, 2 figures

References in corpus (9)

• Disorder and the Supersolid State of Solid ${}^4$He
• Pressure-driven flow of solid helium
• Supersolid Helium at High Pressure
• Freezing and pressure-driven flow of solid helium in Vycor
• Thermodynamics of an incommensurate quantum crystal
• Entropy of solid He4: the possible role of a dislocation glass
• Melting curve of ${}^4$He: no sign of the supersolid transition down to 10 mK
• Strong Coupling Solver for the Quantum Impurity Model
• Theory for supersolid ${}^4$He

Cited by in corpus (10)

• 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
• Heat capacity peak in solid 4He: Effects of disorder and 3He impurities
• Minimal Model for Disorder-induced Missing Moment of Inertia in Solid ${}^4$He
• A glassy contribution to the heat capacity of hcp ${}^4$He solids
• A glass anomaly in the shear modulus of solid ${}^4$He
• Optical lattices as a tool to study defect-induced superfluidity
• Classification of a supersolid: Trial wavefunctions, Symmetry breakings and Excitation spectra
• Shear modulus in viscoelastic solid ${}^4$He
• Anomalous supersolidity in a weakly interacting dipolar Bose mixture on a square lattice
• Defects and glassy dynamics in solid He-4: Perspectives and current status