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- Title
The Heat Capacity of 3He-B in Silica Aerogel.
- Authors
Sauls, J. A.
- Abstract
The thermodynamic potential for superfluid 3 He-B embedded in a homogeneously distributed random potential is calculated from a quasiclassical reduction of the Luttinger–Ward functional to leading order in s = k B T c / E f . The resulting functional provides an extension of the Ginzburg–Landau free energy functional to all temperatures 0 < T ≤ T c . Theoretical predictions based on this functional for the heat capacity of superfluid 3 He-B embedded in homogeneous, isotropic silica aerogel are in good agreement with experimental reports for superfluid 3 He-B infused into 98.2% porous silica aerogel over the pressure range p = 11 - 29 bar . The analysis supports a conclusion that superfluid 3 He-B infused into high-porosity silica aerogels is a gapless superfluid at all pressures.
- Subjects
HEAT capacity; AEROGELS; POROUS silica; THERMODYNAMIC potentials; SUPERFLUIDITY
- Publication
Journal of Low Temperature Physics, 2023, Vol 213, Issue 1/2, p42
- ISSN
0022-2291
- Publication type
Article
- DOI
10.1007/s10909-023-02996-w