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Abstract From one-electron theory it is argued that a starting point for a description of the electronic structure of the high T c compounds is a set of almost filled bands separated by a significant gap from unoccupied bands. But it is also argued that correlation effects are important, and these are included by separating the electronic charge into itinerant and quasilocalized, the latter possessing polarization-waves of exciton character that provide a pairing mechanism for the electrons. It is also suggested that for low enough densities fluctuation effects in the itinerant electrons may significantly modify the standard averaged repulsive contribution to the total pairing interaction.
Abstract From one-electron theory it is argued that a starting point for a description of the electronic structure of the high T c compounds is a set of almost filled bands separated by a significant gap from unoccupied bands. But it is also argued that correlation effects are important, and these are included by separating the electronic charge into itinerant and quasilocalized, the latter possessing polarization-waves of exciton character that provide a pairing mechanism for the electrons. It is also suggested that for low enough densities fluctuation effects in the itinerant electrons may significantly modify the standard averaged repulsive contribution to the total pairing interaction.
Electronic Fluctuation and Pairing
Ashcroft, N. W. (author)
Novel Superconductivity ; 301-308
1987-01-01
8 pages
Article/Chapter (Book)
Electronic Resource
English
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