Disorder effects on the intrinsic nonlinear current density in YBa$_2$Cu$_3$O$_{7-δ}$

Brian M. Andersen; James C. Booth; P. J. Hirschfeld

paper

Disorder effects on the intrinsic nonlinear current density in YBa $_{2}$ Cu $_{3}$ O $_{7 - δ}$

arXiv:cond-mat/0510015

Abstract

We present harmonic generation measurements of the intrinsic nonlinear current density $j_{2}$ of YBa $_{2}$ Cu $_{3}$ O $_{7 - δ}$ (YBCO) films at temperatures close the $T_{c}$ . Experiments on a range of different quality samples allow us to extract the dependence of $j_{2}$ on the penetration depth of the superconductor. In order to model these results, we calculate the intrinsic nonlinear current response of $d_{x^{2} - y^{2}}$ -wave superconductors in the Meissner regime in the presence of nonmagnetic impurities within the self-consistent T-matrix approximation.

5 pages, 3 figures

Disorder effects on the intrinsic nonlinear current density in YBa2​Cu3​O7−δ​

Abstract

Disorder effects on the intrinsic nonlinear current density in YBa $_{2}$ Cu $_{3}$ O $_{7 - δ}$