Pairing Correlations around Negative-U Centre in the Two-Band Model

• Authors: A. Ciechan , K. Wysokiński
• Languages of publication: EN

Abstracts

EN

The electron energy spectrum of many superconducting materials is characterised by the presence of few bands at the Fermi level. In some cases the superconducting properties seem to be dominated by single band but in others the many-band approach is essential ingredient of their description. In this paper we shall study the properties of superconducting impurity placed in a non-superconducting medium. We are interested in the evolution of superconducting correlations within non-superconducting 1- or 2-dimensional system, their dependence on the distance from impurity and changes induced by the presence of the second band and interband scattering. We use real space description of the material and Bogolyubov-de Gennes approach to superconductivity.

Keywords

EN

74.20.-z; 74.81.-g; 74.90.+n

Discipline

• 74.81.-g: Inhomogeneous superconductors and superconducting systems, including electronic inhomogeneities
• 74.20.-z: Theories and models of superconducting state
• 74.90.+n: Other topics in superconductivity (restricted to new topics in section 74)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 114
• Issue: 1
• Pages: 123-127

Dates

published

2008-07

received

2007-11-06

Contributors

author

A. Ciechan

• Institute of Physics and Nanotechnology Centre, M. Curie-Skłodowska University, Radziszewskiego 10, PL-20-031 Lublin, Poland

author

K. Wysokiński

• Institute of Physics and Nanotechnology Centre, M. Curie-Skłodowska University, Radziszewskiego 10, PL-20-031 Lublin, Poland

References

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Identifiers

DOI

10.12693/APhysPolA.114.123