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SINGLE-PARTICLE EXCITATIONS IN THE NORMAL-STATE OF THE NEGATIVE-U HUBBARD-MODEL
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UNSPECIFIED. (1994) SINGLE-PARTICLE EXCITATIONS IN THE NORMAL-STATE OF THE NEGATIVE-U HUBBARD-MODEL. JOURNAL OF PHYSICS-CONDENSED MATTER, 6 (30). pp. 5839-5858. ISSN 0953-8984
Full text not available from this repository.Abstract
One-particle properties of the normal state of a negative-U Hubbard model are analysed within the framework of the incoherent local-pair (ILP) approach. In the self-consistent Hartree-Fock approximation an analytic expression for the critical value U(c) < 0 of the coupling strength is obtained below which the system becomes unstable towards the formation of incoherent local pairs. The single-particle excitation spectrum for different regimes of the attraction strength U and particle concentration n is investigated, and the U-n phase diagram is discussed.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||
| Journal or Publication Title: | JOURNAL OF PHYSICS-CONDENSED MATTER | ||||
| Publisher: | IOP PUBLISHING LTD | ||||
| ISSN: | 0953-8984 | ||||
| Official Date: | 25 July 1994 | ||||
| Dates: |
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| Volume: | 6 | ||||
| Number: | 30 | ||||
| Number of Pages: | 20 | ||||
| Page Range: | pp. 5839-5858 | ||||
| Publication Status: | Published | ||||
| URI: | http://wrap.warwick.ac.uk/id/eprint/20516 |
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