Origin of the D peak in the Raman spectrum of microcrystalline graphite

Istvan Pócsik, Martin Hundhausen, Margit Koós, Lothar Ley

Research output: Contribution to journalArticle

281 Citations (Scopus)

Abstract

We have studied the D peak in the Raman spectrum of polycrystalline graphite as a function of excitation energy in the range from 1.16 to 4.3 eV. The D peak disperses with excitation energy (≈50 cm-1/eV) and its intensity decreases with increasing laser energy. The dispersion of the D peak is explained in terms of a novel k-selective resonant Raman scattering process. The scattering cross-section is resonantly enhanced for phonons on one branch in the phonon dispersion curves which have the same k-vector as the electronic transition responsible for the resonance.

Original languageEnglish
Pages (from-to)1083-1086
Number of pages4
JournalJournal of Non-Crystalline Solids
Volume227-230
Issue numberPART 2
DOIs
Publication statusPublished - May 1998

Keywords

  • D peak
  • Microcrystalline graphite
  • Raman spectrum

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

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