Anisotropic second sound in superfluid sup 4 He near T sub. lambda. in the presence of a heat current

Journal Article · Sat Aug 01 04:00:00 EDT 1992 · Journal of Low Temperature Physics; (United States)

DOI:https://doi.org/10.1007/BF00162960· OSTI ID:7170952

Haussmann, R ^[1]

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1. Technische Hochschule Aachen (Germany)

In the presence of a homogeneous heat current, the isotropy of superfluid {sup 4}He is broken and the propagation of second-sound waves becomes anisotropic. The author calculates the angular dependence of the velocity and damping of second sound near T{sub {lambda}} within model F of Halperin, Hohenberg, and Siggia to leading order in the renormalized couplings. The critical behavior is incorporated using results of the renormalization-group theory. Second-sound waves propagating parallel to the heat current become unstable if the heat current exceeds some critical value. The theory agrees with recent experiments.

• OSTI ID: 7170952
• Journal Information: Journal of Low Temperature Physics; (United States), Journal Name: Journal of Low Temperature Physics; (United States) Vol. 88:3-4; ISSN 0022-2291; ISSN JLTPA
• Country of Publication: United States
• Language: English

Related Subjects

665420* -- Superfluidity-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
EVEN-EVEN NUCLEI
HELIUM 4
HELIUM ISOTOPES
INSTABILITY
ISOTOPES
LAMBDA POINT
LIGHT NUCLEI
NUCLEI
PHYSICAL PROPERTIES
SECOND SOUND
STABLE ISOTOPES
SUPERFLUIDITY
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
WAVE PROPAGATION