Soliton fractional charge of disordered graphene nanoribbon

Y. H. Jeong, Sung Ryul Yang, M. C. Cha

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Abstract

We investigate the properties of the gap-edge states of half-filled interacting disordered zigzag graphene nanoribbons, and find that the midgap states can display a quantized fractional charge of 1/2. These gap-edge states can be represented by topological kinks with their site probability distribution divided between the left and right zigzag edges with different chiralities. In addition, there are numerous spin-split gap-edge states, similar to those in a Mott-Anderson insulator.

Original languageEnglish
Article number265601
JournalJournal of Physics Condensed Matter
Volume31
Issue number26
DOIs
Publication statusPublished - 2019 Apr 23

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Keywords

  • Edge antiferromagnetism
  • Fractional charge
  • Gap states
  • Graphene nanoribbon
  • Mott-anderson insulator
  • Soliton

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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