Novel Josephson Effects in d-wave Superconductor Junctions with Antiferromagnetic Interlayers

Abstract

We calculate the dc supercurrent through a Josephson tunnel junction consisting of an antiferromagnetic (AF) interlayer sandwiched between two d-wave superconductors (d). Such d/AF/d junctions exhibit a rich dependence of the Josephson current on the interlayer parameters, including the possibility of 0-pi transitions with varying temperature or interlayer thickness. Furthermore, we study d/I/d junctions when the dSC leads include subdominant magnetic correlations. In this case induced magnetism near the interface can strongly diminish the critical current for 110 oriented junctions whereas no suppression is obtained for the 100 orientation. This may help resolve a long-standing puzzle of the critical current versus grain boundary angle in high-T_c superconductors.

6 pages, 4 figures

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• Disorder and Critical Current Variability in Josephson Junctions
• Supercurrent through grain boundaries in the presence of strong correlations
• Andreev reflection for MnTe altermagnet candidate
• Inhomogeneous superconductivity in organic conductors: role of disorder and magnetic field
• Proximity effect and electron transport in the oxide hybrid heterostructures with superconducting/magnetic interfaces
• Thermoelectricity and electronic correlations enhancement in FeS by slight Se substitution
• Enhancement of Josephson Supercurrent in a $\pi$-Junction state by Chiral Antiferromagnetism
• Formation of magnetic moments and resistance upturn at grain boundaries of two-dimensional electron systems
• Critical Currents in Conventional Josephson Junctions With Grain Boundaries