Skyrmion-induced bound states in a superconductor

ORAL

Abstract

We consider a superconductor proximity coupled to a two-dimensional ferromagnetic film with a skyrmion texture. We predict the skyrmion bound states (SBS) that are induced in the superconductor, similar to the well-known Yu-Shiba-Rusinov (YSR) states. Using the T-matrix calculations and numerical modeling we calculate the spin-polarized local density of states in the superconductor in the vicinity of the skyrmion. The SBS wavefunctions have spatial power-law decay. Presence of the SBS suggests the mechanism by which superconductivity could facilitate an effective long-range interaction between skyrmions when their SBS wavefunctions overlap. \\ \\ arXiv:1511.01842

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Authors

  • Sergey S. Pershoguba

    Nordita, Center for Quantum Materials, KTH Royal Institute of Technology, and Stockholm University, Roslagstullsbacken 23, S-106 91 Stockholm, Sweden

  • Sho Nakosai

    Condensed Matter Theory Laboratory, RIKEN, Wako, Saitama, 351-0198, Japan, RIKEN

  • Alexander V. Balatsky

    Institute for Materials Science, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA, Los Alamos Natl Lab, Los Alamos Natl Lab and Nordita, Nordita, Stockholm, Sweden and Los Alamos National Laboratory, US