Tricritical behavior of random systems with a coupling to a nonfluctuating parameter
arXiv:cond-mat/9706206 · doi:10.1016/S0375-9601(97)00496-9
Abstract
The influence of disordering upon critical behavior of the system with hidden degrees of freedom is considered. It is shown that there is a tricritical behavior in the constrained system, while in the unconstrained system only phase transitions of the second order occur.
8 pages, latex, 4 figures; to appear in Physics Letters A