Heat capacity and upper critical field for inhomogeneous superconductors: Application to overdoped cuprates

The presence of inhomogeneities has a great impact on the behavior of the heat capacity, particularly near the critical temperature. An expression for δC = Cs-Cn is derived for this case, and is used to calculate the temperature dependence of the upper critical field. The analysis is in good agreement with the experimental data for overdoped cuprates. (orig.)