Measurements of high-frequency sound propagation in He3-B

D. B. Mast*, Bimal K. Sarma, J. R. Owers-Bradley, I. D. Calder, John B Ketterson, William P Halperin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

64 Scopus citations

Abstract

Measurements of the attenuation and velocity of pulsed high-frequency sound have been performed up to 133 MHz in superfluid He3-B. A new collective mode of the order parameter was discovered at a frequency extrapolated to Tc of =(1.165+0.05)BCS(Tc), where BCS(T) is the energy gap in the weak-coupling BCS theory. The group velocity has been observed to decrease by as much as 23 of the zero-sound velocity.

Original languageEnglish (US)
Pages (from-to)266-269
Number of pages4
JournalPhysical Review Letters
Volume45
Issue number4
DOIs
StatePublished - Jan 1 1980

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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