Mixing of dx2−y2 and dxy superconducting states for different filling and temperature

2001/03/13 by Angsula Ghosh, Sadhan K. Adhikari
Materials Science · Physics and Astronomy · #Organic and Molecular Conductors Research #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1016/s0921-4534(01)00932-7

published as Physica C 370 (2002) 146-156 · 14 pages, 10 figures

arxiv created 2001/03/13 · openalex publication_date 2002/05/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We investigate the solution of the gap equation for mixed order parameter symmetry states as a function of filling using a two-dimensional tight-binding model incorporating second-neighbor hopping for tetragonal and orthorhombic lattice. The principal (major) component of the order parameter is taken to be of the d_x²-y² type. As suggested in several investigations the minor component of the order parameter is taken to be of the d_xy type. Both the permissible mixing angles 0 and π/2 between the two components are considered. As a function of filling pronounced maxima of d_x²-y² order parameter is accompanied by minima of the d_xy order parameter. At fixed filling, the temperature dependence of the two components of the order parameter is also studied in all cases. The variation of critical temperature T_c with filling is also studied and T_c is found to increase with second-neighbor hopping.

Citations

• Possible highT c superconductivity in the Ba?La?Cu?O system
• Theory of Superconductivity
• Universal scaling in BCS superconductivity in three dimensions in non-s waves
• Self-Consistent Electronic Structure of adx2−y2and adx2−y2+idxyVortex