Critical behavior of the double layer classical XY-model

Critical phenomena of XY model on two-layer lattice

Critical properties of XY model on two-layer triangular lattice

Subtlety in the Critical Behavior of the Two Dimensional XY Model

Dynamical critical behavior of 3D S=1/2 XY model

Critical behavior of the two-dimensional fully frustrated XY model

Non-universal critical behavior in the planar XY-model with fourth order anisotropy