Starting from a perturbation theory for the free energy of disordered solids, the anomalous temperature dependence of the specific heat can be calculated. The model under consideration is based on the two common features of a large group of disordered solids, firstly, the distorted SRO, and, secondly, the cluster‐like arrangement of strongly distorted atoms which are imbedded in a crystallike matrix. The theory yields the increase of the specific heat proportional to T for very low temperatures and the anomalous high value of the T 3 ‐term. The calculated values coincide very well with the experimentally determined temperature dependence for disordered covalent solids.
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Hüttner et al. (1982) studied this question.
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