One-dimensional XY model in lorentzian random field

One-dimensional XY model in Lorentzian random field

Random isotropic one-dimensional XY-model

One-Dimensional Xy Model with Surface Fields

Alternating S=1/2 XY Chain in Lorentzian Random Field

First order transition in the random two-dimensional XY model

Numerical simulation of the XY-model on a two-dimensional random lattice