Holes localized on a Skyrmion in a doped antiferromagnet on the honeycomb lattice: Symmetry analysis

N. D. Vlasii, C. P. Hofmann, F. J. Jiang, U. J. Wiese

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Using the low-energy effective field theory for hole-doped antiferromagnets on the honeycomb lattice, we study the localization of holes on Skyrmions, as a potential mechanism for the preformation of Cooper pairs. In contrast to the square lattice case, for the standard radial profile of the Skyrmion on the honeycomb lattice, only holes residing in one of the two hole pockets can get localized. This differs qualitatively from hole pairs bound by magnon exchange, which is most attractive between holes residing in different momentum space pockets. On the honeycomb lattice, magnon exchange unambiguously leads to f-wave pairing, which is also observed experimentally. Using the collective-mode quantization of the Skyrmion, we determine the quantum numbers of the localized hole pairs. Again, f-wave symmetry is possible, but other competing pairing symmetries cannot be ruled out.

Original languageEnglish
Pages (from-to)213-243
Number of pages31
JournalAnnals of Physics
Volume354
DOIs
Publication statusPublished - 2015 Mar 1

Keywords

  • Effective field theory
  • Hole-doped antiferromagnet
  • Honeycomb lattice
  • Skyrmion

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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