Dynamic Scaling near the Lambda Point in Liquid Helium

Richard A. Ferrell; Volker Dohm; Jayanta K. Bhattacharjee

doi:10.1103/PhysRevLett.41.1818

Dynamic Scaling near the Lambda Point in Liquid Helium

Richard A. Ferrell, Volker Dohm, and Jayanta K. Bhattacharjee

Phys. Rev. Lett. 41, 1818 – Published 25 December 1978

Abstract

Two-loop calculations indicate that the order parameter in liquid helium at the $λ$ point may relax by an order of magnitude more slowly than the entropy. Consequently the critical region for entropy relaxation is expanded by an order of magnitude, both above and below the $λ$ point, which may help to reconcile light-scattering data, second-sound damping, and dynamic scaling theory. Characteristic double-humped spectra are calculated, providing a crucial test of the present theory.

Received 5 July 1978

DOI:https://doi.org/10.1103/PhysRevLett.41.1818

Authors & Affiliations

Richard A. Ferrell

Institute for Physical Science and Technology and Department of Physics and Astronomy, University of Maryland, College Park, Maryland 20742

Volker Dohm^*,†

Department of Physics and Astronomy, University of Maryland, College Park, Maryland 20742, and Institut für Festkörperforschung, Kernforschungsanlage Jülich, 517 Jülich, Germany

Jayanta K. Bhattacharjee