Interband interference effects at the edge of a multiband chiral p-wave superconductor

Abstract

Chiral superconductors support chiral edge modes and potentially spontaneous edge currents at their boundaries. Motivated by the putative multiband chiral p-wave superconductor Sr${}_2$RuO${}_4$, we study the influence of the interference between different bands at the edges, which may appear in the presence of moderate edge disorder or in edge tunneling measurements. We show that interband interference can strongly modify the measurable quantities at the edges when the order parameter exhibits phase difference between the bands. This is illustrated by investigating the edge dispersion and the edge current distribution in the presence of interband mixing, as well as the conductance at a tunneling junction. The results are discussed in connection with the putative chiral p-wave superconductor Sr${}_2$RuO${}_4$. In passing, we also discuss similar interference effects in multiband models with other pairing symmetries.

arXiv comment8 pages, 8 figures

References in corpus (40)

• Evaluation of Spin-Triplet Superconductivity in Sr2RuO4
• Chiral Superconductors
• Chiral P-Wave Order in Sr_2RuO_4
• Quasiparticle States near the Surface and the Domain Wall in a p_x\pm i p_y-Wave Superconductor
• Edge modes, edge currents, and gauge invariance in $p_x+i{p}_y$ superfluids and superconductors
• Fermi Surface, Surface States, and Surface Reconstruction in Sr2RuO4
• Upper limit on spontaneous supercurrents in Sr${}_2$RuO${}_4$
• Detailed Topography of the Fermi Surface of Sr2RuO4
• Spin-triplet superconductivity in Sr${}_2$RuO${}_4$ probed by Andreev reflection
• Limits on Superconductivity-Related Magnetization in Sr${}_2$RuO${}_4$ and PrOs${}_4$Sb${}_{12}$ from Scanning SQUID Microscopy
• Chiral $d$-wave Superconductivity in SrPtAs
• Edge states of Sr${}_2$RuO${}_4$ detected by in-plane tunneling spectroscopy
• Spontaneous Hall effect in chiral p-wave superconductor
• Andreev Reflection in Heavy-Fermion Superconductors and Order Parameter Symmetry in CeCoIn_5
• Surface States, Edge Currents and the Angular Momentum of Chiral p-wave Superfluids
• Is Sr2RuO4 a Chiral P-Wave Superconductor?
• Conventional mechanisms for "exotic" superconductivity
• Theory of tunneling conductance for normal metal/insulator/triplet superconductor junctions
• Large Chern Number and Edge Currents in Sr2RuO4
• Andreev spectra and subgap bound states in multiband superconductors
• Vanishing edge currents in non-$p$-wave topological chiral superconductors
• Orbital Angular Momentum and Spectral Flow in Two Dimensional Chiral Superfluids
• Non-topological nature of the edge current in a chiral p-wave superconductor
• Impurity-induced bound states in iron-based superconductors with s-wave cos(kx)cos(ky) pairing symmetry
• Current inversion at the edges of a chiral $\mathbf{p}$-wave superconductor
• Andreev Bound states as a phase sensitive probe of the pairing symmetry of the iron pnictide superconductors
• Suppression of spontaneous currents in Sr${}_2$RuO${}_4$ by surface disorder
• Properties of edge states in spin-triplet two-band superconductor
• Suppression of Spontaneous Supercurrents in a Chiral p-Wave Superconductor
• Determining the Surface-To-Bulk Progression in the Normal-State Electronic Structure of Sr2RuO4 by Angle-Resolved Photoemission and Density Functional Theory
• Spontaneous edge current in a small chiral superconductor with a rough surface
• Topological and edge state properties of a three-band model for Sr2RuO4
• Vortex coalescence and type-1.5 superconductivity in Sr2RuO4
• Microscopic theory of tunneling spectroscopy in Sr${}_2$RuO${}_4$
• Leggett modes and multi-band superconductivity in Sr2RuO4
• Time-reversal symmetry breaking state near the surface of $s_{\pm }$-superconductor
• Josephson effect in a multi-orbital model for Sr${}_2$RuO${}_4$
• Ground state angular momentum, spectral asymmetry, and topology in chiral superfluids and superconductors
• Equilibrium Surface Current and Role of U(1) Symmetry: sum rule and surface perturbations
• Even odder after twenty-three years: the superconducting order parameter puzzle of Sr2RuO4

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