Propagating phonons in liquid 4He

A.F.G. Wyatt, N.A. Lockerbie, R.A. Sherlock

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

at T approximately=0.1 K is studied as a function of pressure input power and propagation distance. Using a superconducting tunnel junction detector it is found that a single injected pulse can form two propagating pulses at low pressures but only one at high pressures. It is shown that three-phonon scattering can explain this behaviour. At low pressures, one group of phonons propagates ballistically while another group consists of strongly interacting phonons which travel at the ultrasonic velocity.
LanguageEnglish
Pages3507-3522
Number of pages15
JournalJournal of Physics: Condensed Matter
Volume1
Issue number22
DOIs
Publication statusPublished - 5 Jun 1989

Fingerprint

Phonons
phonons
low pressure
Liquids
liquids
pulses
tunnel junctions
travel
ultrasonics
Ultrasonic velocity
Phonon scattering
propagation
Tunnel junctions
detectors
scattering
Detectors

Keywords

  • quantum gases
  • liquids
  • solids
  • condensed matter
  • structural
  • mechanical
  • thermal

Cite this

Wyatt, A.F.G. ; Lockerbie, N.A. ; Sherlock, R.A. / Propagating phonons in liquid 4He. In: Journal of Physics: Condensed Matter. 1989 ; Vol. 1, No. 22. pp. 3507-3522.
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Propagating phonons in liquid 4He. / Wyatt, A.F.G.; Lockerbie, N.A.; Sherlock, R.A.

In: Journal of Physics: Condensed Matter, Vol. 1, No. 22, 05.06.1989, p. 3507-3522.

Research output: Contribution to journalArticle

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AU - Wyatt, A.F.G.

AU - Lockerbie, N.A.

AU - Sherlock, R.A.

PY - 1989/6/5

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AB - at T approximately=0.1 K is studied as a function of pressure input power and propagation distance. Using a superconducting tunnel junction detector it is found that a single injected pulse can form two propagating pulses at low pressures but only one at high pressures. It is shown that three-phonon scattering can explain this behaviour. At low pressures, one group of phonons propagates ballistically while another group consists of strongly interacting phonons which travel at the ultrasonic velocity.

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KW - liquids

KW - solids

KW - condensed matter

KW - structural

KW - mechanical

KW - thermal

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T2 - Journal of Physics: Condensed Matter

JF - Journal of Physics: Condensed Matter

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