Beyond double-resonant Raman scattering: Ultraviolet Raman spectroscopy on graphene, graphite, and carbon nanotubes
Tyborski C, Herziger F, Gillen R, Maultzsch J (2015)
Publication Status: Published
Publication Type: Journal article
Publication year: 2015
Journal
Publisher: AMER PHYSICAL SOC
Book Volume: 92
Journal Issue: 4
DOI: 10.1103/PhysRevB.92.041401
Open Access Link: https://arxiv.org/abs/1503.08031
Abstract
We present an analysis of deep-UV Raman measurements of graphite, graphene, and carbon nanotubes. For excitation energies above the strong optical absorption peak at the M point in the Brillouin zone (approximate to 4.7 eV), we partially suppress double-resonant scattering processes and observe the two-phonon density of states of carbon nanomaterials. The measured peaks are assigned to contributions from LO, TO, and LA phonon branches, supported by calculations of the phonon dispersion. Moreover, we gain access to the infrared-active E-1u mode in graphite. By lowering the excitation energy and thus allowing double-resonant scattering processes, we demonstrate the rise of the 2D mode in graphite with ultrashort phonon wave vectors.
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Germany (DE)How to cite
APA:
Tyborski, C., Herziger, F., Gillen, R., & Maultzsch, J. (2015). Beyond double-resonant Raman scattering: Ultraviolet Raman spectroscopy on graphene, graphite, and carbon nanotubes. Physical Review B, 92(4). https://dx.doi.org/10.1103/PhysRevB.92.041401
MLA:
Tyborski, Christoph, et al. "Beyond double-resonant Raman scattering: Ultraviolet Raman spectroscopy on graphene, graphite, and carbon nanotubes." Physical Review B 92.4 (2015).
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