Quartett formation at (100)/(110)-interfaces of d-wave superconductors

Abstract

Across a faceted (100)/(110) interface between two d-wave-superconductors the structure of the superconducting order parameter leads to an alternating sign of the local Josephson coupling. Describing the Cooper pair motion along and across the interface by a one-dimensional boson lattice model, we show that a small attractive interaction between the bosons boosts boson binding at the interface -- a phenomenon, which is intimately tied to the staggered sequence of 0- and Pi-junction contacts along the interface. We connect this finding to the recently observed h/4e oscillations in (100)/(110) SQUIDS of cuprate superconductors.

arXiv comment13 pages, 2 figures

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• Competing Orders in One-Dimensional Half-Integer Fermionic Cold Atoms: A Conformal Field Theory Approach
• 4e-condensation in a fully frustrated Josephson junction diamond chain
• Bipairing and the Stripe Phase in 4-Leg Ladders
• Extension of Frohlich's method to 4-fermion interactions
• Cascade of vestigial orders in two-component superconductors: nematic, ferromagnetic, s-wave charge-4e, and d-wave charge-4e states
• Frustrated superconductivity and sextetting order
• Fractional Flux Quantization in Loops of Unconventional Superconductors
• Trionic and quartetting phases in one-dimensional multicomponent ultracold fermions
• Andreev reflection in normal metal/charge-4e superconductor junctions
• Local condensation of charge-$4e$ superconductivity at a nematic domain wall
• hc/4e oscillations in a model for (100)/(110) SQUIDs of d-wave superconductors
• Multimagnon and multispinon $L_3$-edge RIXS spectra of an effective ${\tilde{J}}_1-{\tilde{J}}_2-{\tilde{J}}_3$ square lattice Heisenberg model