Superfluid density and critical current density in superconducting cuprates with an extended d-wave pairing symmetry

Orifjon K. Ganiev () and Bakhrom Ya. Yavidov
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Orifjon K. Ganiev: Uzbekistan Academy of Sciences
Bakhrom Ya. Yavidov: Nukus State Pedagogical Institute named after A’jiniyaz

The European Physical Journal B: Condensed Matter and Complex Systems, 2021, vol. 94, issue 5, 1-9

Abstract: Abstract In this paper, we have investigated superfluid density, $$\rho _\mathrm{s}$$ ρ s , and the critical current density, $$J_\mathrm{c}$$ J c , 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 $$\rho _\mathrm{s}(T)$$ ρ s ( T ) and critical current density $$J_\mathrm{c}(T)$$ J c ( T ) 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. Graphic abstract

Date: 2021
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DOI: 10.1140/epjb/s10051-021-00130-x

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