1.
Phys Rev Lett
; 89(28 Pt 1): 285702, 2002 Dec 31.
Article
in English
| MEDLINE
| ID: mdl-12513162
ABSTRACT
We prove that various SO(n)-invariant n-vector models with interactions which have a deep and narrow enough minimum have a first-order transition in the temperature. The result holds in dimensions two or more and is independent of the nature of the low-temperature phase.