Third-sound velocity and onset on Grafoil

Journal Article · Mon Feb 04 04:00:00 EST 1980 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.44.333· OSTI ID:5534897

Roth, J A; Jelatis, G J; Maynard, J D

Third-sound velocity and onset measurements have been made for /sup 4/He adsorbed on Grafoil foam. The third-sound velocity has a dependence on film thickness and temperature similar to that of third sound on glass substrates, with some distinguishing features. The film vapor pressure at onset has, to some degree, the universal temperature dependence found for other substrates. The superfluid areal density divided by the onset temperature agrees with the universal constant predicted by the Kosterlitz-Thouless-Nelson theory to within 11%.

• Research Organization: Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802
• OSTI ID: 5534897
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 44:5; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

640450* -- Fluid Physics-- Superfluidity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ADSORPTION
BOLOMETERS
CARBON
ELEMENTS
EVEN-EVEN NUCLEI
FILMS
GRAPHITE
HELIUM 4
HELIUM ISOTOPES
HIGH VACUUM
ISOTOPES
LIGHT NUCLEI
MEASURING INSTRUMENTS
NONMETALS
NUCLEI
SORPTION
STABLE ISOTOPES
TEMPERATURE DEPENDENCE
THIRD SOUND
VELOCITY