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SUPERCONDUCTING PROPERTIES OF NEGATIVE-U CENTERS MATERIALS: CHALCOGENIDES, CUPRATE OXIDES AND FULLERIDES

K. D. Tsendin1,*

Affiliation

  1. A. F. Ioffe Physico-Technical Institute, Russian Academy of Sciences, 194021, Saint-Petersburg, Russia

Abstract

If the concentration of negative-U centers is enough to create the pair band states, this can lead to superconductivity (negative-U centers model of superconductivity) because Anderson pairs are Bose particles. In the present paper it has been shown that several puzzling superconductivity properties of chalcogenides, high-temperature cuprate superconductors and fullerides are similar for these three groups of materials and can be naturally explained in the frame of negative-U centers model of superconductivity - NUCS model..

Keywords

Chalcogenides, High-temperature superconductors, Fullerides, Superconductivity.

Submitted at: May 11, 2005
Accepted at: July 21, 2005

Citation

K. D. Tsendin, SUPERCONDUCTING PROPERTIES OF NEGATIVE-U CENTERS MATERIALS: CHALCOGENIDES, CUPRATE OXIDES AND FULLERIDES, Journal of Optoelectronics and Advanced Materials Vol. 7, Iss. 4, pp. 1941-1947 (2005)