Torsional Oscillator Study of Thin Helium Films on Hydrogen Substrates

Daryl Tulimieri, Norbert Mulders, Moses Hung-Wai Chan

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Abstract

We have made torsional oscillator measurements of thin helium films on a Mylar surface preplated with 2 and 5 layers of H2. The minimum 4He coverage needed for superfluidity, or "inert" layer, n0 on both surfaces is found to be 6 μmole/m2. This is equivalent to 1/2 of a monolayer at bulk liquid density. The superfluid transition in coverages above n0 is similar to that found on bare Mylar, exhibiting the standard Kosterlitz-Thouless characteristics. We find no anomaly in ρs or the dissipation in the film that can be identified with a second transition reported in recent third sound experiments.

Original languageEnglish (US)
Pages (from-to)609-614
Number of pages6
JournalJournal of Low Temperature Physics
Volume110
Issue number1-2
Publication statusPublished - Dec 1 1998

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All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Tulimieri, D., Mulders, N., & Chan, M. H-W. (1998). Torsional Oscillator Study of Thin Helium Films on Hydrogen Substrates. Journal of Low Temperature Physics, 110(1-2), 609-614.