Interlayer interaction in general incommensurate atomic layers

Mikito Koshino

Research output: Contribution to journalArticlepeer-review

52 Citations (Scopus)

Abstract

We present a general theoretical formulation to describe the interlayer interaction in incommensurate bilayer systems with arbitrary crystal structures. By using the generic tight-binding description, we show that the interlayer coupling, which is highly complex in the real space, can be simply written in terms of generalized Umklapp process in the reciprocal space. The formulation is useful to describe the interaction in the two-dimensional interface of different materials with arbitrary lattice structures and relative orientations. We apply the method to the incommensurate bilayer graphene with a large rotation angle, which cannot be treated as a long-range moiré superlattice, and obtain the quasi band structure and density of states within the first-order approximation.

Original languageEnglish
Article number015014
JournalNew Journal of Physics
Volume17
DOIs
Publication statusPublished - 2015 Jan 27

Keywords

  • grapheme
  • moire superlattice
  • transition metal dichalcogenides

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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