Heat Capacity Anomalies and Thermal Crossovers in Finite Su-Schrieffer-Heeger Chains
The study investigated finite Su-Schrieffer-Heeger (SSH) chains using thermal equilibrium ensembles to find thermodynamic properties like heat capacity. The key finding is a double-peak anomaly in the heat capacity for non-dimerized configurations, identified as a Schottky-type thermal crossover between two energy scales. This shows that bulk thermodynamics reveal rich structures beyond topological classification, tunable by hopping asymmetry.