Critical behavior of superfluid {sup 4}He in aerogel
Journal Article
·
· Physical Review Letters
- Department of Physics, University of California, Davis, California 95616 (United States)
- Department of Physics, Indiana University, Bloomington, Indiana 47405 (United States)
We report Monte Carlo studies of the critical behavior of superfluid {sup 4}He in the presence of quenched disorder with long-range fractal correlations. Modeling aerogel as an incipient percolating cluster in 3D and weakening the bonds at the fractal sites, {ital XY}-model simulations demonstrate an increase in the superfluid density exponent {zeta} from 0.67{plus_minus}0.005 for the pure case to an apparent value of 0.722{plus_minus}0.005 in the presence of the fractal disorder, provided that the helium correlation length does not exceed the fractal correlation length.
- OSTI ID:
- 122981
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 7 Vol. 75; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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