Critical currents in Josephson junctions, with unconventional pairing symmetry: $d_{x^2-y^2}+is$ versus $d_{x^2-y^2}+i{d}_{xy}$

Abstract

Phenomenological Ginzburg-Landau theory is used to calculate the possible spontaneous vortex states that may exist at corner junctions of $d_{x^2-y^2}+ix$-wave, (where $x=s$ or $x=d_{xy}$) and s-wave superconductors. We study the magnetic flux and the critical current modulation with the junction orientation angle $\theta$, the magnitude of the order parameter, and the magnetic field $H$. It is seen that the critical current $I_c$ versus the magnetic flux $\Phi$ relation is symmetric / asymmetric for $x=d_{xy}/s$ when the orientation is exactly such that the lobes of the dominant $d_{x^2-y^2}$-wave order parameter points towards the two junctions, which are at right angles for the corner junction. The conclusion is that a measurement of the $I_c(\Phi )$ relation may distinguish which symmetry ($d_{x^2-y^2}+is$ or $d_{x^2-y^2}+i{d}_{xy}$) the order parameter has.

11 pages with 11 figures, Changed content

References in corpus (2)

• Stability analysis of static solutions in a Josephson junction
• Critical currents in Josephson junctions with macroscopic defects

Cited by in corpus (3)

• Resonant flux motion and I-V -characteristics in frustrated Josephson junctions
• The effect of nearest neighbor spin-singlet correlations in conventional graphene SNS Josephson junctions
• Resolving the order parameter of High-T${}_c$ Superconductors through quantum pumping spectroscopy