Superfluidity of {sup 4}He films adsorbed on hydrogen plated graphite
- Royal Holloway Univ. of London (United Kingdom); and others
The superfluidity of {sup 4}He on graphite with various preplatings of HD is under investigation using a torsional oscillator. Results for a bilayer of HD follow a similar pattern to those obtained earlier on pure {sup 4}He films and are consistent with third sound measurements on graphite plated with a bilayer of hydrogen. In our case the first {sup 4}He layer solidifies, consistent with behaviour observed in NMR studies of {sup 3}He on a similarly prepared substrate. At a coverage of 11 nm{sup -2} there is the onset of a region in which the transition temperature increases rapidly with coverage and the transition itself becomes sharper. At certain coverages pronounced signatures have been observed in the period shift and dissipation, which may indicate a further phase transition in the film at lower temperatures.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 198182
- Report Number(s):
- CONF-950676--
- Journal Information:
- Journal of Low Temperature Physics, Journal Name: Journal of Low Temperature Physics Journal Issue: 1-2 Vol. 101; ISSN 0022-2291; ISSN JLTPAC
- Country of Publication:
- United States
- Language:
- English
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