Pimentel, B. M.Zimerman, A. H.2022-04-292022-04-291975-06-16Physics Letters A, v. 53, n. 3, p. 200-202, 1975.0375-9601http://hdl.handle.net/11449/230705By means of the use of the gap equations, we calculate the thermodynamic properties of a sufficiently general Dicke model. We obtain the general relations which correspond to the condition of second-order phase transition from the normal to the superradiant state. © 1975.200-202engArtigo10.1016/0375-9601(75)90405-32-s2.0-0000512682