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Ion-irradiation effects on the phonon correlation length of graphite studied by Raman spectroscopy

Kazutaka Nakamura and Masahiro Kitajima

  • Second Research Group, Tsukuba Laboratories, National Research Institute for Metals, 1-2-1 Sengen, Tsukuba-shi, Ibaraki-ken 305, Japan

Phys. Rev. B 45, 78 – Published 1 January, 1992

DOI: https://doi.org/10.1103/PhysRevB.45.78

Abstract

Real-time Raman measurements have been performed on graphite under 3-keV Ar+-ion irradiation with a time resolution of 6 sec. Ion flux of 3×1011 and 4×1010 ions/cm2 sec are used. The graphite lattice damage is estimated by the relative intensity ratio of the disorder-induced peak (∼1360 cm1) with respect to the Raman-active E2g-mode peak (∼1580 cm1). The relative intensity change in the Raman spectrum caused by the irradiation is explained in terms of a reduction in the phonon correlation length due to defects.

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