Abstract

In this paper, we have investigated superfluid density, \(\rho _\mathrm{s}\), and the critical current density, \(J_\mathrm{c}\), 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 \(\rho _\mathrm{s}(T)\) and critical current density \(J_\mathrm{c}(T)\) 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

中文翻译：

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具有扩展的 d 波配对对称性的超导铜酸盐中的超流体密度和临界电流密度

摘要

在本文中，我们研究了铜酸盐超导体中的超流体密度\(\rho _\mathrm{s}\)和临界电流密度\(J_\mathrm{c}\)。Chandrasekhar 和 Einzel 方法用于计算具有不同配对情况的超导有序参数和超流体密度，例如各向同性s -、各向异性s -波和节点d -波，以及间隙的扩展d -波对称性. 此外，计算扩展d的临界电流密度- 各向异性铜酸盐超导体中角分辨光电子能谱 (ARPES) 测量建议的波隙。将温度相关的超流体密度\(\rho _\mathrm{s}(T)\)和临界电流密度\(J_\mathrm{c}(T)\)的计算结果与获得的实验数据进行比较各种铜酸盐超导体。对于所有考虑的情况，在理论和实验数据之间发现了良好的定量一致性。

图形摘要