s-Wave Order Parameter in the Presence of a Momentum-Dependent Impurity Scattering Potential

• Authors: D. Rudzińska , P. Pisarski , G. Harań
• Languages of publication: EN

Abstracts

EN

Momentum dependence of the impurity potential leads to the anisotropy of a local density of states in isotropic s-wave superconductors. We complete this result by discussing the influence of a momentum-dependent impurity potential on the s-wave order parameter. The scattering process is considered in the T-matrix approximation, and the model impurity potential consists of two separate terms representing isotropic (on-site) and anisotropic (momentum-dependent) parts of the potential. We show that the effect of the isotropic part on the order parameter is local whereas the influence of the momentum-dependent term is nonlocal.

Keywords

EN

74.62.Dh; 74.78.-w; 74.81.-g

Discipline

• 74.81.-g: Inhomogeneous superconductors and superconducting systems, including electronic inhomogeneities
• 74.78.-w: Superconducting films and low-dimensional structures
• 74.62.Dh: Effects of crystal defects, doping and substitution(for specific crystal defects, see 61.72.-y)

• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 114
• Issue: 1
• Pages: 149-152

Dates

published

2008-07

received

2007-11-06

Contributors

author

D. Rudzińska

• Institute of Physics, Politechnika Wrocławska, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

author

P. Pisarski

• Institute of Physics, Politechnika Wrocławska, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

author

G. Harań

• Institute of Physics, Politechnika Wrocławska, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

References

• 1. P. Pisarski, G. Harań, Physica C 390, 270 (2003)
• 2. A. Maciag, P. Pisarski, G. Harań, Acta Phys. Pol. B 34, 479 (2003)
• 3. P. Pisarski, G. Harań, Phys. Status Solidi B 242, 426 (2005)
• 4. P.W. Anderson, J. Phys. Chem. Solids 11, 26 (1959)
• 5. L. Capriotti, D.J. Scalapino, R.D. Sedgewick, Phys. Rev. B 68, 014508 (2003)
• 6. A.L. Fetter, Phys. Rev. 140, A1921 (1965)
• 7. T. Xiang, J.M. Wheatley, Phys. Rev. B 51, 11721 (1995)
• 8. G. Litak, Physica B 359-361, 566 (2005)
• 9. A. Ghosal, M. Randeria, N. Trivedi, Phys. Rev. Lett. 81, 3940 (1998)
• 10. G. Harań, A.D.S. Nagi, Phys. Rev. B 58, 12441 (1998)

Identifiers

DOI

10.12693/APhysPolA.114.149