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Observation of One-Dimensional Second Sound in Superfluid Helium

Eisenstein, J. P. and Narayanamurti, V. (1986) Observation of One-Dimensional Second Sound in Superfluid Helium. Physical Review Letters, 57 (7). pp. 839-842. ISSN 0031-9007.

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A new collective mode of heat transport has been observed in superfluid helium at low temperatures and pressures. Unlike ordinary second sound, this new mode travels at essentially the acoustic-sound velocity and is characterized by the nearly collinear phonon relaxation arising from anomalous dispersion. The mode has been found to persist into the collisionless regime, ωτ>1.

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Additional Information:©1986 The American Physical Society Received 16 May 1986 It is a pleasure to thank R. C. Dynes for several essential discussions of this work. We thank H. L. Stormer for helpful comments and we are indebted to J. C. M. Hwang for growing the GaAs heterostructure and to M. A. Chin and K. Baldwin for the fabrication of the heaters and bolometers.
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Deposited On:25 Jul 2006
Last Modified:18 Sep 2014 18:11

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