Helicity moduli of three-dimensional dilute XY models

Garg, Anupam ; Pandit, Rahul ; Solla, Sara A. ; Ebner, C. (1984) Helicity moduli of three-dimensional dilute XY models Physical Review B: Condensed Matter and Materials Physics, 30 (1). pp. 106-113. ISSN 1098-0121

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Official URL: http://prb.aps.org/abstract/PRB/v30/i1/p106_1

Related URL: http://dx.doi.org/10.1103/PhysRevB.30.106

Abstract

The helicity moduli of various dilute, classical XY models on three-dimensional lattices are studied with a view to understanding some aspects of the superfluidity of 4He in Vycor glass. A spinwave calculation is used to obtain the low-temperature helicity modulus of a regularly-diluted XY model. A similar calculation is performed for the randomly bond-diluted and site-diluted XY models in the limit of low dilution. A Monte Carlo simulation is used to obtain the helicity modulus of the randomly bond-diluted XY model over a wide range of temperature and dilution. It is found that the randomly diluted models do agree and the regularly diluted model does not agree with certain experimentally found features of the variation in superfluid fraction with coverage of 4He in Vycor glass.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:72701
Deposited On:29 Nov 2011 04:38
Last Modified:29 Nov 2011 04:38

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