Freezing and pressure-driven flow of solid helium in Vycor

Details Freezing and pressure-driven flow of solid helium in Vycor Freezing and pressure-driven flow of solid helium in Vycor

2005-06-23

arxiv.org/abs/cond-mat/0506619v1

Phys. Rev. Lett., vol. 95, 035301 (2005)

Physics

Condensed Matter

Other Condensed Matter

5 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.95.035301

The recent torsional oscillator results of Kim and Chan suggest a supersolid phase transition in solid He-4 confined in Vycor. We have used a capacitive technique to directly monitor density changes for helium confined in Vycor at low temperature and have used a piezoelectrically driven diaphragm to study the pressure-induced flow of solid helium into the Vycor pores. Our measurements showed no indication of a mass redistribution in the Vycor that could mimic supersolid decoupling and put an upper limit of about 0.003 um/s on any pressure-induced supersolid flow in the pores of Vycor.

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