Observability of surface currents in p-wave superconductors

Abstract

A general approach is formulated to describe spontaneous surface current distribution in a chiral p-wave superconductor. We use the quasiclassical Eilenberger formalism in the Ricatti parametrization to describe various types of the superconductor surface, including arbitrary roughness and metallic behaviour of the surface layer. We calculate angle resolved distributions of the spontaneous surface currents and formulate the conditions of their observability. We argue that local measurements of these currents by muSR technique may provide an information on the underlying pairing symmetry in the bulk superconductor.

10 pages, 4 figures. Submitted to Superconductor Science and Technology

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• Spontaneous supercurrent and $\varphi$0 phase shift parallel to magnetized topological insulator interfaces
• Spontaneous surface flux pattern in chiral p-wave superconductors - revisited
• Spontaneous Edge Current in Higher Chirality Superconductors
• Identifying possible pairing states in Sr${}_2$RuO${}_4$ by tunneling spectroscopy
• Destruction of surface states of ($d_{zx}+i{d}_{yz}$)-wave superconductor by surface roughness: application to Sr${}_2$RuO${}_4$
• Local impedance on a rough surface of a chiral $p$-wave superconductor
• Influence of diffuse surface scattering on the stability of superconducting phases with spontaneous surface current generated by Andreev bound states
• Robustness of chiral surface current and subdominant $s$-wave Cooper pairs
• Laser pulse probe of chirality of Cooper pairs
• DC-current induced domain wall in a chiral $p$-wave superconductor