DOI

We investigate the N = 9 atoms wide armchair-type graphene nanoribbons (9-AGNRs) by performing a comprehensive spectroscopic and microscopic characterization of this novel material. In particular, we use X-ray photoelectron, near edge X-ray absorption fine structure, scanning tunneling, polarized Raman and angle-resolved photoemission (ARPES) spectroscopies. The ARPES measurements are aided by calculations of the photoemission matrix elements which yield the position in k space having the strongest photoemission cross section. Comparison with well-studied narrow N = 7 AGNRs shows that the effective electron mass in 9-AGNRs is reduced by two times and the valence band maximum is shifted to lower binding energy by ∼0.6 eV. In polarized Raman measurements of the aligned 9-AGNR, we reveal anisotropic signal depending upon the phonon symmetry. Our results indicate the 9-AGNRs are a novel 1D semiconductor with a high potential in nanoelectronic applications.

Original languageEnglish
Article number1700157
JournalPhysica Status Solidi - Rapid Research Letters
Volume11
Issue number8
DOIs
StatePublished - 1 Aug 2017

    Research areas

  • angle-resolved photoelectron spectroscopy, graphene, nanoribbons, near edge X-ray absorption fine structure spectroscopy, Raman spectroscopy, X-ray photoelectron spectroscopy

    Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

ID: 9216541