Characteristic Crossing Points in Specific Heat Curves of Correlated Systems

TL;DR

This paper investigates the crossing points in specific heat curves of correlated systems, providing a quantitative explanation based on the temperature dependence of generalized susceptibilities.

Contribution

It offers a novel theoretical explanation for the crossing points in specific heat curves of correlated systems using susceptibility analysis.

Findings

Identifies characteristic crossing points in specific heat curves

Links crossing points to generalized susceptibilities

Provides a quantitative model for the phenomenon

Abstract

Attention is drawn to the observation that in many correlated systems (e.g. 3He, heavy fermion systems and Hubbard models) the specific heat curves, when plotted for different values of some thermodynamic variable (e.g. pressure, magnetic field, interaction), cross almost precisely at one or two characteristic temperatures. A quantitative explanation of this phenomenon, based on the temperature dependence of the associated generalized susceptibilities, is presented.