Supercurrent through grain boundaries in the presence of strong correlations

Abstract

Strong correlations are known to severely reduce the mobility of charge carriers near half-filling and thus have an important influence on the current carrying properties of grain boundaries in the high-$T_c$ cuprates. In this work we present an extension of the Gutzwiller projection approach to treat electronic correlations below as well as above half-filling consistently. We apply this method to investigate the critical current through grain boundaries with a wide range of misalignment angles for electron- and hole-doped systems. For the latter excellent agreement with experimental data is found. We further provide a detailed comparison to an analogous weak-coupling evaluation.

4 pages, 3 figures

References in corpus (4)

• Extended Gutzwiller Approximation for Inhomogeneous System
• Novel Josephson Effects in d-wave Superconductor Junctions with Antiferromagnetic Interlayers
• Angular dependence of Josephson currents in unconventional superconducting junctions
• Quantitative calculations of charge carrier densities in the depletion layers at YBa2Cu3O7-x interfaces

Cited by in corpus (5)

• Disorder and Critical Current Variability in Josephson Junctions
• Thermoelectricity and electronic correlations enhancement in FeS by slight Se substitution
• Formation of magnetic moments and resistance upturn at grain boundaries of two-dimensional electron systems
• Critical Currents in Conventional Josephson Junctions With Grain Boundaries
• Strengthened correlations near [110] edges of $d$-wave superconductors in the t-J model with the Gutzwiller approximation