Measurements of high-frequency sound propagation in He3-B

D. B. Mast; Bimal K. Sarma; J. R. Owers-Bradley; I. D. Calder; J. B. Ketterson; W. P. Halperin

doi:10.1103/PhysRevLett.45.266

Measurements of high-frequency sound propagation in He3-B

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

^*Corresponding author for this work

Physics and Astronomy

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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 language	English (US)
Pages (from-to)	266-269
Number of pages	4
Journal	Physical review letters
Volume	45
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevLett.45.266
State	Published - 1980

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Physics and Astronomy(all)

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10.1103/PhysRevLett.45.266

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title = "Measurements of high-frequency sound propagation in He3-B",

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.",

author = "Mast, {D. B.} and Sarma, {Bimal K.} and Owers-Bradley, {J. R.} and Calder, {I. D.} and Ketterson, {J. B.} and Halperin, {W. P.}",

year = "1980",

doi = "10.1103/PhysRevLett.45.266",

language = "English (US)",

volume = "45",

pages = "266--269",

journal = "Physical Review Letters",

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T1 - Measurements of high-frequency sound propagation in He3-B

AU - Mast, D. B.

AU - Sarma, Bimal K.

AU - Owers-Bradley, J. R.

AU - Calder, I. D.

AU - Ketterson, J. B.

AU - Halperin, W. P.

PY - 1980

Y1 - 1980

N2 - 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.

AB - 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.

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JF - Physical Review Letters

SN - 0031-9007

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Measurements of high-frequency sound propagation in He3-B

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