Missing valence states, diamagnetic insulators, and superconductors

About fifteen elements in the periodic table skip certain valences in all the compounds they form. This is understood to arise from a negative effective intra-atomic interaction. A model with such interactions as well as interatomic repulsions gives insulating behavior near half-filling and supercon...

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Bibliographic Details
Published in:Physical review letters 1988-12, Vol.61 (23), p.2713-2716
Main Author: VARMA, C. M
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Physics
Superconductivity
Theory and models of superconducting state
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Summary:About fifteen elements in the periodic table skip certain valences in all the compounds they form. This is understood to arise from a negative effective intra-atomic interaction. A model with such interactions as well as interatomic repulsions gives insulating behavior near half-filling and superconductivity farther from it in agreement with the properties of BaPb(x)Bi(1-x)O3 and Ba(x)K(1-x)BiO3. (Author)
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.61.2713