Dimensionality of the superfluid transition in /sup 4/He films adsorbed on 550-A Al/sub 2/O/sub 3/ powder

Journal Article · Fri Jul 01 04:00:00 EDT 1983 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.28.440· OSTI ID:5846213

Kotsubo, V; Williams, G A

The dimensionality of the superfluid transition in thin /sup 4/He films adsorbed on 500-A-diameter Al/sub 2/O/sub 3/ powder has been investigated with use of third-sound measurements. A sharp drop in /rho is observed at film thicknesses just below the critical Kosterlitz-Thouless value, indicating that the transition remains two dimensional for this pore size above 1.2 K. The sound signal can be observed to very low values of the superfluid density because the measured attenuation near onset is much smaller than that observed previously on flat substrates.

• Research Organization: Department of Physics, University of California, Los Angeles, California 90024
• OSTI ID: 5846213
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 28:1; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

640450* -- Fluid Physics-- Superfluidity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ADSORPTION
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CHALCOGENIDES
CORUNDUM
EVEN-EVEN NUCLEI
FILMS
HELIUM 4
HELIUM ISOTOPES
ISOTOPES
LIGHT NUCLEI
MINERALS
NUCLEI
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
POWDERS
RUBY
SORPTION
SORPTIVE PROPERTIES
STABLE ISOTOPES
SUPERFLUIDITY
SURFACE PROPERTIES
THIN FILMS
THIRD SOUND