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APS » Journals » Phys. Rev. Lett. » Volume 76 » Issue 16
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Phys. Rev. Lett. 76, 2910–2913 (1996)

Monte Carlo Studies of Helicity Modulus and Heat Capacity of a Coupled XY Model in Two Dimensions

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I. M. Jiang1, T. Stoebe2, and C. C. Huang3
1Department of Physics, National Sun Yat-sen University, Kaohsiung, Taiwan
2Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455
3School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455

Received 21 July 1995; published in the issue dated 15 April 1996

Utilizing Monte Carlo simulation techniques, we have calculated both the helicity modulus and heat capacity versus temperature of a coupled classical XY model in two dimensions. Our model system is based on a Hamiltonian first proposed by Bruinsma and Aeppli [Phys. Rev. Lett. 48, 1625 (1982)]. The helicity modulus results strengthen our previous report of a new type of phase transition in which two distinct types of order are simultaneously established through a single continuous transition.

© 1996 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.76.2910
DOI:
10.1103/PhysRevLett.76.2910
PACS:
61.30.-v, 64.60.-i, 64.70.Md
 
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