Superconducting materials with electron pairs localized on lattice ions

Journal Article · Fri Jul 01 00:00:00 EDT 1983 · Sov. Phys. - Solid State (Engl. Transl.); (United States)

OSTI ID:5497819

Moizhes, B Y; Drabkin, I A

We propose the following classification scheme for superconductors, depending on the probable type of electron--electron interaction: A) Semiconductors containing impurities with negative Hubbard energy in which pairs exist in r-space when T>T/sub c/: Pb/sub 1-x/Tl/sub x/Te, Ba(Pb/sub 1-x/Bi/sub x/)O/sub 3/xxx. In this case the superconducting phase transition must compete with the ordering of ions having different charges: Pb/sub 1-x/In/sub x/Te. B) Metals near the metal--insulator transition with virtual two-electron levels near the Fermi level: Na/sub x/WO/sub 3/. C) Metals containing ''active'' atoms (ions) with an odd number of electrons and a small Hubbard energy. We suggest that the contribution of diamagnetic polar configurations to the total energy of the metal can increase when coherent states are formed: Nb, La/sub 3/S/sub 4/, Nb/sub 1-x/Ti/sub x/xxx.

• Research Organization: All-Union Scientific-Research, Design-Planning, and Technological Institute of Current Sources, Leningrad
• OSTI ID: 5497819
• Journal Information: Sov. Phys. - Solid State (Engl. Transl.); (United States), Journal Name: Sov. Phys. - Solid State (Engl. Transl.); (United States) Vol. 25:7; ISSN SPSSA
• Country of Publication: United States
• Language: English

Related Subjects

656101* -- Solid State Physics-- Superconductivity-- General Theory-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CLASSIFICATION
ELECTRON PAIRS
ELECTRON-ELECTRON INTERACTIONS
ELEMENTS
ENERGY LEVELS
FERMI LEVEL
IMPURITIES
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
METALS
PARTICLE INTERACTIONS
SUPERCONDUCTORS