Generalized Matsubara-Toyozawa theory for the specific heat in heavily-phosphorus-doped silicon

Abstract
The previously developed theory for impurity bands in heavily doped semiconductors is used to calculate the specific heat of Si: P. It gives rough agreement with experimental data over a wide range of impurity concentration around the critical concentration for metal-nonmetal transition. Recent calculations based on the highly-correlated-electron-gas model are included for comparison.