Superfluid critical behavior in sup 4 He-filled porous media

Journal Article · Sun Nov 04 23:00:00 EST 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.65.2410· OSTI ID:6100013

Wong, G K.S.; Crowell, P A; Cho, H A; Reppy, J D ^[1]

---

1. The Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, NY (USA) Materials Science Center, Clark Hall, Cornell University, Ithaca, NY (USA)

We have observed sharp cusplike heat-capacity singularities, coincident with the superfluid transition, in two {sup 4}He-filled aerogel glasses. These features are interpreted as conclusive evidence of genuine critical behavior at the superfluid transition in these systems. The cusplike heat-capacity singularities confirm that {sup 4}He-filled aerogels are not in the same universality class as bulk helium.

• OSTI ID: 6100013
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 65:19; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

640450* -- Fluid Physics-- Superfluidity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COLLOIDS
DATA
DISPERSIONS
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
GELS
GLASS
HELIUM 4
HELIUM ISOTOPES
INFORMATION
ISOTOPES
LAMBDA POINT
LIGHT NUCLEI
MATERIALS
NUCLEI
NUMERICAL DATA
PHYSICAL PROPERTIES
POROUS MATERIALS
SINGULARITY
SPECIFIC HEAT
STABLE ISOTOPES
SUPERFLUIDITY
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE