First-order transitions for some generalized XY models

Aernout van Enter (1, 2) , Silvano Romano (1, 2) , Valentin A. Zagrebnov (1, 2)

1 CPT - Centre de Physique Théorique - UMR 6207
2 CPT - Centre de Physique Théorique - UMR 7332

In this note we demonstrate the occurrence of first-order transitions in temperature for some recently introduced generalized XY models, and also point out the connection between them and annealed site-diluted (lattice-gas) continuous-spin models.

Domaines: Physique mathématique [math-ph]; Mécanique statistique [cond-mat.stat-mech]

Aernout van Enter, Silvano Romano, Valentin A. Zagrebnov. First-order transitions for some generalized XY models. 2006. ⟨hal-00023400v1⟩