Electronic properties and topological phases of a two-dimensional allotrope of nitrogenated carbon

A. León, W. Orellana, E. Suárez Morell, M. Pacheco

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

In this work we propose a two-dimensional carbon-nitrogen allotrope composed of pentagons and octagons in a structure of carbon chains bound by nitrogen dimers. Our first-principles calculations show the system behaves as a small-gap semiconductor which is thermodynamically stable at room temperature confirmed by molecular dynamic simulations. By cutting the sheet along different crystallographic directions, a variety of metallic or semiconductor one-dimensional ribbons can be obtained. We explore the topological properties of these nanoribbons finding that for a particular boundary geometry nontrivial topological phases can be obtained, depending on the ribbon termination. We investigate the emergence of symmetry protected interface topological states in heterojunctions and topological-induced edge states in finite ribbons.

Original languageEnglish
Article number085408
JournalPhysical Review B
Volume101
Issue number8
DOIs
Publication statusPublished - 15 Feb 2020

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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