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Raman spectroscopy of graphite.

Stephanie Reich1, Christian Thomsen

  • 1Department of Engineering, University of Cambridge, Trumpington Street, Cambridge CB2 1PZ, UK. sr379@eng.cam.ac.uk

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|October 16, 2004
PubMed
Summary

This review clarifies the origin of disorder-induced Raman bands in graphite using double-resonant Raman scattering. This approach explains various spectral features and corrects previous misinterpretations.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Spectroscopy

Background:

  • Disorder-induced Raman bands in graphite have been a long-standing puzzle for nearly three decades.
  • Understanding these bands is crucial for characterizing graphite's properties.

Purpose of the Study:

  • To provide a comprehensive review of graphite's Raman spectra from both experimental and theoretical perspectives.
  • To elucidate the origin of disorder-induced Raman bands using double-resonant Raman scattering theory.

Main Methods:

  • Reviewing experimental Raman spectroscopy data of graphite.
  • Applying theoretical double-resonant Raman scattering models.
  • Developing and applying symmetry-imposed selection rules for Raman scattering in graphite.

Main Results:

  • Double-resonant Raman scattering successfully explains the origin of disorder-induced Raman bands.
  • The theory accounts for excitation-energy dependence, overtone spectra, and Stokes/anti-Stokes scattering differences.
  • Identified and corrected misassignments in previously published Raman studies of graphite.
  • Achieved excellent agreement between phonon dispersion derived from Raman scattering and other experimental techniques.

Conclusions:

  • Double-resonant Raman scattering provides a robust theoretical framework for understanding graphite's Raman spectra.
  • This work resolves a nearly 30-year-old puzzle concerning disorder-induced Raman bands.
  • The findings offer a more accurate interpretation of graphite's vibrational properties.

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