Charge Order versus Superconductivity in Inhomogeneous Systems
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