Abstract
We introduce an equivalence relation on the family of ground states and generalize the Peierls and Pirogov-Sinai theory of phase transitions to systems with residual entropy. The idea consists in the replacement of the periodic ground states by equivalence classes together with an entropy factor. We apply these results to discuss the phase diagrams of diluted spin-1/2 systems.
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On leave of absence from the Central Research Institute for Physics, Budapest, Hungary.
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Gruber, C., Sütö, A. Phase diagrams of lattice systems with residual entropy. J Stat Phys 52, 113–142 (1988). https://doi.org/10.1007/BF01016407
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DOI: https://doi.org/10.1007/BF01016407