Studies on the interaction between two correlated electronic bands. I. Phase transition in NiS

Author:

Abstract

An expression for the density of states of two electronic bands with intraand inter-band correlations has been derived. The consequences of the inter-band interaction on Mott-Hubbard split bands are discussed. The model is applied to explain the metal, semi-metal and magnetic phase transitions in NiS by using a semi-elliptical form for the density of states of non-interacting electrons. It is shown that the temperature-dependent overlap and hybridization parameters between d- and p-bands can provoke both the phase transitions in NiS as pointed out earlier by White & Mott (1971)

Publisher

The Royal Society

Subject

Pharmacology (medical)

Reference34 articles.

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4. P hys;Rev. B,1974

5. P hys;Rev. B,1974

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