Exact results of a generalized Wu model with two- and four-spin interactions.
The mixed spin-1/2 and spin-S(B) Ising model with two- and four-spin interactions on the honeycomb lattice is studied by the use of a generalized star-triangle transformation. The exact results for the phase diagrams, magnetization, correlation functions, internal energy, specific heat, and quadrupolar susceptibility are obtained and discussed.
Lacková
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Department of Theoretical Physics and Geophysics, Faculty of Science, P. J. Safárik University, Moyzesova 16, 041 54 Kosice, Slovak Republic.
Jascur
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