High frequency acoustic measurements in liquid 3He near the transition temperature

Y. Lee; P. J. Hamot; D. T. Sprague; T. M. Haard; J. B. Kycia; M. R. Rand; M. W. Meisel; William P Halperin

doi:10.1007/BF00754788

High frequency acoustic measurements in liquid ³He near the transition temperature

Y. Lee^*, P. J. Hamot, D. T. Sprague, T. M. Haard, J. B. Kycia, M. R. Rand, M. W. Meisel, William P Halperin

^*Corresponding author for this work

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

We have made accurate measurements of the phase velocity in liquid ³He at 0.6 bar near T_c using a path length modulation technique. The frequency used in this measurement (113 MHz) is much higher than any of the collective mode frequencies and well above the threshold for pair-breaking, ω ≫ Δ and ω ≫ 2Δ₀. We have observed a sharp but small linear increase in the phase velocity below T_c and a small decrease from the expected behavior in the normal fluid region very close to the transition temperature.

Original language	English (US)
Pages (from-to)	265-272
Number of pages	8
Journal	Journal of Low Temperature Physics
Volume	103
Issue number	5-6
DOIs	https://doi.org/10.1007/BF00754788
State	Published - Jan 1 1996

ASJC Scopus subject areas

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

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@article{a41549268bc842aaa09a5f58933f3ccb,

title = "High frequency acoustic measurements in liquid 3He near the transition temperature",

abstract = "We have made accurate measurements of the phase velocity in liquid 3He at 0.6 bar near Tc using a path length modulation technique. The frequency used in this measurement (113 MHz) is much higher than any of the collective mode frequencies and well above the threshold for pair-breaking, ω ≫ Δ and ω ≫ 2Δ0. We have observed a sharp but small linear increase in the phase velocity below Tc and a small decrease from the expected behavior in the normal fluid region very close to the transition temperature.",

author = "Y. Lee and Hamot, {P. J.} and Sprague, {D. T.} and Haard, {T. M.} and Kycia, {J. B.} and Rand, {M. R.} and Meisel, {M. W.} and Halperin, {William P}",

year = "1996",

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doi = "10.1007/BF00754788",

language = "English (US)",

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TY - JOUR

T1 - High frequency acoustic measurements in liquid 3He near the transition temperature

AU - Lee, Y.

AU - Hamot, P. J.

AU - Sprague, D. T.

AU - Haard, T. M.

AU - Kycia, J. B.

AU - Rand, M. R.

AU - Meisel, M. W.

AU - Halperin, William P

PY - 1996/1/1

Y1 - 1996/1/1

N2 - We have made accurate measurements of the phase velocity in liquid 3He at 0.6 bar near Tc using a path length modulation technique. The frequency used in this measurement (113 MHz) is much higher than any of the collective mode frequencies and well above the threshold for pair-breaking, ω ≫ Δ and ω ≫ 2Δ0. We have observed a sharp but small linear increase in the phase velocity below Tc and a small decrease from the expected behavior in the normal fluid region very close to the transition temperature.

AB - We have made accurate measurements of the phase velocity in liquid 3He at 0.6 bar near Tc using a path length modulation technique. The frequency used in this measurement (113 MHz) is much higher than any of the collective mode frequencies and well above the threshold for pair-breaking, ω ≫ Δ and ω ≫ 2Δ0. We have observed a sharp but small linear increase in the phase velocity below Tc and a small decrease from the expected behavior in the normal fluid region very close to the transition temperature.

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U2 - 10.1007/BF00754788

DO - 10.1007/BF00754788

M3 - Article

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EP - 272

JO - Journal of Low Temperature Physics

JF - Journal of Low Temperature Physics

IS - 5-6

ER -

High frequency acoustic measurements in liquid ³He near the transition temperature

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