Surface charging in d-wave superconductors

ORAL

Abstract

Near surfaces d-wave superconductivity is suppressed and competing order parameters can emerge. Of particular interest is the formation of antiferromagnetism which can be accompanied by a charging of the surface similar to the vortex case. We analyze this scenario for different surface orientations by solving the Bogoliubov-de Gennes equations for a model Hamiltonian with competing antiferromagnetic and d-wave superconducting interactions. In special limits analytical solutions are possible and help to identify the role of Andreev bound states. Finally, we discuss the implications of an angle-dependent surface charge for the critical current through interfaces.

–

Authors

  • Tamara Nunner

    • Department of Physics, University of Florida, Gainesville, FL32611-8440

  • Irina Bobkova

  • Yuri Barash

    • Institute of Solid State Physics, Chernogolovka, Moscow

  • Peter Hirschfeld

    • Department of Physics, University of Florida
    • Dept. of Physics, U. Florida
    • Department of Physics, University of Florida, Gainesville, FL32611-8440
    • Department of Physics, University of Florida, Gainesville, Florida 32611, USA