Real Space Bogoliubov-de Gennes Equations Study of the Boson-Fermion Model

• Authors: J. Krzyszczak , T. Domański , K. Wysokiński
• Languages of publication: EN

Abstracts

EN

The boson-fermion model was proposed to describe superconductivity in short coherence length superconductors. In this work we use it to study impurity induced inhomogeneities in high temperature superconductors as found in numerous scanning tunnelling measurements. The model was formulated in real space and solved with help of Bogoliubov-de Gennes approach. Disorder in the boson or fermion subsystem is directly coupled to the superconducting order parameter and leads to severe changes of superconducting properties like local order parameter and density of states. We present the results for many impurities randomly distributed over otherwise clean and periodic two-dimensional square lattice.

Keywords

EN

71.10.Fd; 74.20.-z; 74.81.-g

Discipline

• 74.81.-g: Inhomogeneous superconductors and superconducting systems, including electronic inhomogeneities
• 74.20.-z: Theories and models of superconducting state
• 71.10.Fd: Lattice fermion models (Hubbard model, etc.)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 114
• Issue: 1
• Pages: 165-169

Dates

published

2008-07

received

2007-11-06

Contributors

author

J. Krzyszczak

• Institute of Physics and Nanotechnology Centre, M. Curie-Skłodowska University, pl. M. Curie-Skłodowskiej 1, 20-031 Lublin, Poland

author

T. Domański

• Institute of Physics and Nanotechnology Centre, M. Curie-Skłodowska University, pl. M. Curie-Skłodowskiej 1, 20-031 Lublin, Poland

author

K. Wysokiński

• Institute of Physics and Nanotechnology Centre, M. Curie-Skłodowska University, pl. M. Curie-Skłodowskiej 1, 20-031 Lublin, Poland

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Identifiers

DOI

10.12693/APhysPolA.114.165