Topology-induced inverse phase transitions
Daniele De Martino, Serena Bradde, Luca Dall’Asta, Matteo Marsili · Europhysics Letters (EPL) · 2012
Inverse phase transitions are striking phenomena in which an apparently more ordered state gets disordered under cooling. This behavior can naturally emerge in tricritical systems on heterogeneous networks and it is strongly enhanced by the presence of disassortative degree correlations. We show it both analytically and numerically, providing also a microscopic interpretation of inverse transitions in terms of freezing of sparse subgraphs and coupling renormalization.