We study patterns of the phase diagram of ferromagnetic Ising models
on graphs under an external magnetic field. We provide an example of a tree
with only two types of vertices on which for a range of values of the external
field there is a unique Gibbs distribution at low enough and at high enough
temperatures, while at intermediate temperatures there is phase coexistence (in
other words, a reentrance transition takes place).
@article{1027961042,
author = {Schonmann, Roberto H. and Tanaka, Nelson I.},
title = {Lack of monotonicity in ferromagnetic Ising model phase
diagrams},
journal = {Ann. Appl. Probab.},
volume = {8},
number = {1},
year = {1998},
pages = { 234-245},
language = {en},
url = {http://dml.mathdoc.fr/item/1027961042}
}
Schonmann, Roberto H.; Tanaka, Nelson I. Lack of monotonicity in ferromagnetic Ising model phase
diagrams. Ann. Appl. Probab., Tome 8 (1998) no. 1, pp. 234-245. http://gdmltest.u-ga.fr/item/1027961042/