Fig. 5.
Two maxima in the specific heat for the model. (A) The MC isobaric specific heat CP (•), at P = 0.1 MPa has two maxima, decomposed into the components 
(□) and 
(⋄) described in the text. (B) 
(□) and 
(⋄) show maxima where 
and 
, respectively, have maxima. (C) MF calculations at P = 0 for the case with cooperative interaction (Jσ/ϵ = 0.05, solid line labeled as 
) show two maxima for CP, whereas for the case without cooperative interaction (Jσ = 0, dashed line labeled as 
) there is no low-T maximum that, hence, is due to the cooperativity.