Phase Transitions in Ferromagnetic Ising Models with spatially dependent magnetic fields
arXiv:1403.7961 · doi:10.1007/s00220-014-2268-6
Abstract
In this paper we study the nearest neighbor Ising model with ferromagnetic interactions in the presence of a space dependent magnetic field which vanishes as , , as . We prove that in dimensions for all large enough if there is a phase transition while if there is a unique DLR state.
to appear in Communications in Mathematical Physics