On Possibility of Realization of d- or p-Wave Symmetry States in Anisotropic Superconductors

• Authors: R Gonczarek , M Krzyzosiak
• Languages of publication: EN

Abstracts

EN

We consider a model of high-T_c superconductors with an anisotropic boson-mediated pairing mechanism corresponding to the nearest-neighbor interactions, and the one-particle dispersion relation characterized by 2D Fermi surface nesting. Based upon the tight-binding or t-J approaches with half-filling we show that the effective pairing potential coefficients and the dispersion relation, which can be characterized by the parameterη=2t_1/t_0, have a diverse and mutually competing influence on the values of transition temperatures. The spin-singlet d-wave symmetry superconducting state is realized for small values ofη, whereas for sufficiently large values, the spin-triplet p-wave symmetry superconducting state should be formed. The specific heat jump and the isotope shift, as functions of the parameter η, are evaluated for the d- and p-wave symmetry.

Keywords

EN

74.20.Rp; 74.62.Yb

Discipline

• 74.62.Yb: Other effects
• 74.20.Rp: Pairing symmetries (other than s-wave)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2006
• Volume: 109
• Issue: 4-5
• Pages: 493-498

Dates

published

2006-04

received

2005-09-25

Contributors

author

R Gonczarek

• Institute of Physics, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

author

M Krzyzosiak

• Institute of Physics, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

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Identifiers

DOI

10.12693/APhysPolA.109.493