Electronic structure of ion-implanted graphite

Abstract

The magnetoreflection technique is applied to study Landau-level transitions in graphite implanted with $^{31}\mathrm{P}$ ions at a variety of fluences and energies. The magnetoreflection spectra are explained in terms of the Slonczewski-Weiss-McClure band model with small changes in the band parameters that describe pristine graphite. Neglecting trigonal warping, the fluence dependence of the nearest-neighbor intraplanar (${\ensuremath{\gamma}}_{0}$) and interplanar (${\ensuremath{\gamma}}_{1}$) overlap integrals is presented. The observed changes in these band parameters are consistent with increasing disorder as the fluence of implantation increases.