Superfluid density in porous Vycor glass

Journal Article · Mon Nov 10 04:00:00 EST 1975 · Phys. Rev. Lett., v. 35, no. 19, pp. 1286-1289

DOI:https://doi.org/10.1103/PhysRevLett.35.1286· OSTI ID:4106537

Kiewiet, C W; Hall, H E; Reppy, J D

The superfluid density of $sup 4$He confined to porous Vycor glass has been determined from fourth-sound measurements over a temperature range from below 0.1 K to within 10 mK of the transition. For temperatures below 1.4 K the normal-fluid fraction can be described in terms of a roton contribution with gap $delta$/k/subB/=5.85 K and a ''one-dimensional,'' T$sup 2$, phonon contribution. Near the transition temperature, T/subc/=1.955 K, the superfluid density is found to vary as (T/subc/-T)/sup zeta/ with zeta=0.65plus-or-minus0.03. (AIP)

• Research Organization: Physics Department, Schuster Laboratory, The University, Manchester M13 9PL, England
• Sponsoring Organization: USDOE
• NSA Number: NSA-33-018452
• OSTI ID: 4106537
• Journal Information: Phys. Rev. Lett., v. 35, no. 19, pp. 1286-1289, Journal Name: Phys. Rev. Lett., v. 35, no. 19, pp. 1286-1289; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

*HELIUM II-- FOURTH SOUND
640700*
N62100* --Physics (Fluid)--Electrofluid Mechanics
ORDER PARAMETERS
PHONONS
POROSITY
ROTONS
SUPERFLUIDITY
TRANSITION TEMPERATURE
VYCOR