Thermodynamics of the Classical Planar Ferromagnet Close to the Zero-Temperature Critical Point: A Many-Body Approach
Figure 3
Schematic low-temperature phase diagram and crossovers in the -plane of the CPFM with . Here stands for classical critical behavior; , and , denote the critical, Ginzburg, and crossover lines; OP and DP indicate the ordered and disordered phases, respectively. The critical line behaves linearly with and the characteristic quantum-like V-shaped region, with vertex in the ()-CP, is clearly evident.
