Theory of pairing symmetry in the vortex states

Takehito Yokoyama, Masanori Ichioka, Yukio Tanaka, Alexander Golubov

Research output: Contribution to journalArticle

Abstract

We investigate pairing symmetry in an Abrikosov vortex and vortex lattice. It is shown that the Cooper pair wave function at the center of an Abrikosov vortex with vorticity m has a different parity with respect to frequency from that in the bulk if m is an odd number, while it has the same parity if m is an even number. As a result, in a conventional vortex with m = 1, the local density of states at the Fermi energy has a maximum (minimum) at the center of the vortex core in an even (odd)-frequency superconductor. In the vortex lattice of s-wave superconductor, we find that only odd-frequency pairing is present at the core centers, while at the midpoint of the vortex lines, only even-frequency pairing exists. Thus, the odd and even-frequency pairings also form the lattice in the vortex lattice state. We also propose a scanning tunneling microscope experiment using a superconducting tip to explore odd-frequency superconductivity.

Original languageEnglish
Pages (from-to)766-770
Number of pages5
JournalPhysica C: Superconductivity and its applications
Volume470
Issue number19
DOIs
Publication statusPublished - Oct 1 2010

Keywords

  • Pairing symmetry
  • Vortex state

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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