Phys. Rev. Lett. 77, 1793–1796 (1996)Heat Capacity Anomalies of Superfluid 4He under the Influence of a Counterflow near TλReceived 23 February 1996; published in the issue dated 26 August 1996 We present a thermodynamic treatment of superfluid helium in the presence of an applied heat current, Q, which produces a counterflow velocity W⃗. We show that the heat capacity can be expressed in terms of the dependence of the superfluid density on W⃗. 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 W⃗ rather than Q is held constant, the heat capacity remains finite. © 1996 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.77.1793
DOI:
10.1103/PhysRevLett.77.1793
PACS:
67.40.Kh, 64.60.-i, 67.40.Bz, 67.40.Pm
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.