Charge Order versus Superconductivity in Inhomogeneous Systems
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We examine the disordered system with defined attractive centers of carries attraction. By changing concentration of such centers one can model the appearance of a superconducting order. To study electron correlations and to describe disorder effects, the Negative U Hubbard model and the Coherent Potential Approximation (CPA) have been applied. Our approach includes the charge fluctuations on the equal foot.
KeywordsCDW Disorder Hubbard model Percolation
- 5.Ehrenreich, H., Schwartz, L.: Solid State Phys. 31 (1976) Google Scholar