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Published August 26, 1996 | Published
Journal Article Open

Heat capacity anomalies of superfluid He-4 under the influence of a counterflow near T-lambda

Abstract

We present a thermodynamic treatment of superfluid helium in the presence of an applied heat current, Q, which produces a counterflow velocity W→. We show that the heat capacity can be expressed in terms of the dependence of the superfluid density on W→. Near Tλ, both mean field theory and renormalization group theory give a divergent heat capacity with an exponent of 0.5 at a depressed transition temperature. In contrast, if W→ rather than Q is held constant, the heat capacity remains finite.

Additional Information

©1996 The American Physical Society. Received 23 February 1996. We would like to acknowledge helpful discussions with Dr. Yury Mukharsky, Anoop Prasad, and Professor Peter Weichman. T.C.P.C. and A.W.H. would like to thank NASA Microgravity Science and Application Division for its support.

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