The metal–non-metal transition in nickel sulphide (NiS)
- 1 October 1971
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine
- Vol. 24 (190) , 845-856
- https://doi.org/10.1080/14786437108217054
Abstract
Hexagonal nickel sulphide shows a transition at 260 K from an antiferromagnetic to a paramagnetic state which is accompanied by an abrupt change in the conductivity. It is suggested that this is not a Néel temperature, that is a destruction of long-range order, but a first-order disappearance of the moments, and that it occurs because of the screening out of the Hubbard intra-atomic electron-electron interaction by the electrons in the sulphur 3p band. It is also shown that the low temperature phase is probably a semimetal.Keywords
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