ComplexTemperature Singularities of Ising Models
Abstract
We report new results on complextemperature properties of Ising models. These include studies of the s = 1/2 model on triangular, honeycomb, kagomé, 3·12 ^{2}, and 4·8 ^{2} lattices. We elucidate the complex T phase diagrams of the higherspin 2D Ising models, using calculations of partition function zeros. Finally, we investigate the 2D Ising model in an external magnetic field, mapping the complex T phase diagram and exploring various singularities therein. For the case βH = iπ/2, we give exact results on the phase diagram and obtain susceptibility exponents γ' at various singularities from lowtemperature series analyses.
 Publication:

Nuclear Physics B Proceedings Supplements
 Pub Date:
 March 1996
 DOI:
 10.1016/09205632(96)001612
 arXiv:
 arXiv:heplat/9509054
 Bibcode:
 1996NuPhS..47..731S
 Keywords:

 High Energy Physics  Lattice
 EPrint:
 4 pages, latex, to appear in the Proceedings of Lattice95