Publication: Bond and site defects in fully frustrated two-dimensional Ising systems
Issued Date
1997-05-07
Resource Type
ISSN
03054470
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2-s2.0-0040092366
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Mahidol University
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SCOPUS
Bibliographic Citation
Journal of Physics A: Mathematical and General. Vol.30, No.9 (1997), 2947-2962
Suggested Citation
J. R. Gonçalves, J. Poulter, J. A. Blackman Bond and site defects in fully frustrated two-dimensional Ising systems. Journal of Physics A: Mathematical and General. Vol.30, No.9 (1997), 2947-2962. doi:10.1088/0305-4470/30/9/010 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/18009
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Title
Bond and site defects in fully frustrated two-dimensional Ising systems
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Abstract
The Villain model and the triangular antiferromagnet are the two canonical fully frustrated two-dimensional Ising systems. Exact results are presented for the entropy changes that occur when bond and site defects are introduced into these systems. The results for single defects are obtained first. Pairs of site defects are then discussed. The change in entropy is evaluated to the leading term in an expansion in powers of R -1 where R is the separation of the defects. The entropy shift is ∼ R -2 in both models except for special values of R in the Villain model where it is ∼ R -4.