https://doi.org/10.1140/epjb/s10051-021-00130-x
Regular Article - Solid State and Materials
Superfluid density and critical current density in superconducting cuprates with an extended d-wave pairing symmetry
1
Institute of Nuclear Physics, Uzbekistan Academy of Sciences, 100214, Tashkent, Uzbekistan
2
Faculty of Physics, National University of Uzbekistan, 100174, Tashkent, Uzbekistan
3
Nukus State Pedagogical Institute named after A’jiniyaz, 230105, Nukus, Uzbekistan
Received:
4
April
2021
Accepted:
15
May
2021
Published online:
28
May
2021
In this paper, we have investigated superfluid density, 
, and the critical current density, 
, in cuprate superconductors. The Chandrasekhar and Einzel approach was applied to calculate the superconducting order parameter and superfluid density with different pairing scenario, such as isotropic s-, anisotropic s-wave, and nodal d-wave, as well as an extended d-wave symmetry of the gap. Moreover, the critical current density is calculated for the extended d-wave gap suggested by angle-resolved photoemission spectroscopy (ARPES) mesurements in anisotropic cuprate superconductors. The calculated results for the temperature-dependent superfluid density 
and critical current density 
were compared with the experimental data obtained for various cuprate superconductors. A good quantitative agreement was found between theory and experimental data for all cases considered.
© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2021
