Group-velocity spectroscopy of collective modes in superfluid He3-B

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

doi:10.1103/PhysRevLett.45.1866

Group-velocity spectroscopy of collective modes in superfluid He3-B

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

^*Corresponding author for this work

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

31 Scopus citations

Abstract

The group velocity of high-frequency sound for TTc, and the group velocity and attenuation of sound at higher temperatures, have been measured and analyzed to give the frequencies and coupling strengths of two order-parameter collective modes in He3-B. For the squashing mode at 13.1 bars and T→0, ωsqΔBCS=1.501 and the coupling constant λsq=0.010±0.001. The recently discovered collective mode at ωνΔBCS=1.075 (T→0) has a coupling constant determined from the group velocity to be λν=5.8×10-6.

Original language	English (US)
Pages (from-to)	1866-1869
Number of pages	4
Journal	Physical review letters
Volume	45
Issue number	23
DOIs	https://doi.org/10.1103/PhysRevLett.45.1866
State	Published - 1980

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General Physics and Astronomy

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10.1103/PhysRevLett.45.1866

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title = "Group-velocity spectroscopy of collective modes in superfluid He3-B",

abstract = "The group velocity of high-frequency sound for TTc, and the group velocity and attenuation of sound at higher temperatures, have been measured and analyzed to give the frequencies and coupling strengths of two order-parameter collective modes in He3-B. For the squashing mode at 13.1 bars and T→0, ωsqΔBCS=1.501 and the coupling constant λsq=0.010±0.001. The recently discovered collective mode at ωνΔBCS=1.075 (T→0) has a coupling constant determined from the group velocity to be λν=5.8×10-6.",

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

year = "1980",

doi = "10.1103/PhysRevLett.45.1866",

language = "English (US)",

volume = "45",

pages = "1866--1869",

journal = "Physical review letters",

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publisher = "American Physical Society",

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T1 - Group-velocity spectroscopy of collective modes in superfluid He3-B

AU - Calder, I. D.

AU - Mast, D. B.

AU - Sarma, Bimal K.

AU - Owers-Bradley, J. R.

AU - Ketterson, J. B.

AU - Halperin, W. P.

PY - 1980

Y1 - 1980

N2 - The group velocity of high-frequency sound for TTc, and the group velocity and attenuation of sound at higher temperatures, have been measured and analyzed to give the frequencies and coupling strengths of two order-parameter collective modes in He3-B. For the squashing mode at 13.1 bars and T→0, ωsqΔBCS=1.501 and the coupling constant λsq=0.010±0.001. The recently discovered collective mode at ωνΔBCS=1.075 (T→0) has a coupling constant determined from the group velocity to be λν=5.8×10-6.

AB - The group velocity of high-frequency sound for TTc, and the group velocity and attenuation of sound at higher temperatures, have been measured and analyzed to give the frequencies and coupling strengths of two order-parameter collective modes in He3-B. For the squashing mode at 13.1 bars and T→0, ωsqΔBCS=1.501 and the coupling constant λsq=0.010±0.001. The recently discovered collective mode at ωνΔBCS=1.075 (T→0) has a coupling constant determined from the group velocity to be λν=5.8×10-6.

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DO - 10.1103/PhysRevLett.45.1866

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JO - Physical review letters

JF - Physical review letters

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ER -

Group-velocity spectroscopy of collective modes in superfluid He3-B

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