Depression of the superfluid transition in {sup 4}He

Journal Article · Sun Nov 01 04:00:00 EST 1992 · Journal of Low Temperature Physics

DOI:https://doi.org/10.1007/BF00694056· OSTI ID:138557

Haussmann, R; Dohm, V ^[1]

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1. Technische Hochschule Aachen (Germany)

The authors study superfluid {sup 4}He near T{sub {lambda}} in a homogeneous metastable state where a finite superfluid velocity v{sub s} is present. Neglecting vortices they perform a renormalization-group calculation of the critical velocity v{sub sc}(T) at which the superfluid state becomes unstable. They apply this result to the situation where the superfluid velocity is induced by a finite heat current Q. A critical heat current Q{sub c}(T) corresponding to v{sub sc}(T) is found which implies a transition temperature T{sub {lambda}} (Q) = T{sub {lambda}} [1-A{sub 0}Q{sup x}]. They determine the exact exponent x = [(d-1){nu}]{sup {minus}1} {approx} 0.744 in d = 3 dimensions and calculate A{sub 0} in one-loop order. The results for A{sub 0} and x are compared with recent experimental data. 14 refs., 1 fig.

• Sponsoring Organization: USDOE
• OSTI ID: 138557
• Journal Information: Journal of Low Temperature Physics, Journal Name: Journal of Low Temperature Physics Journal Issue: 3-4 Vol. 89; ISSN JLTPAC; ISSN 0022-2291
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CRITICAL PRESSURE
GROUP THEORY
HELIUM
INSTABILITY
PHASE TRANSFORMATIONS
PRESSURE DEPENDENCE
QUANTUM FLUIDS
RENORMALIZATION
SUPERFLUIDITY
TEMPERATURE RANGE 0000-0013 K
VORTICES