Heteroepitaxial Film of Monolayer Graphene/Monolayerh-BN onNi(111)

T. Tanaka, A. Ito, A. Tajima, E. Rokuta and C. Oshima
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T. Tanaka: Department of Applied Physics, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan;
A. Ito: Department of Applied Physics, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan;
A. Tajima: Department of Applied Physics, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan;
E. Rokuta: Department of Applied Physics, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan;
C. Oshima: Department of Applied Physics, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan;

Surface Review and Letters (SRL), 2003, vol. 10, issue 05, 721-726

Abstract: Heteroepitaxial multilayers, consisting of graphene/hexagonal boron nitride (h-BN) films onNi(111), have been investigated by means of vibrational spectroscopy, low energy electron diffraction and Auger electron spectroscopy. Vibrational spectra of the heteroepitaxial film show the appearance of transverse optical(TO⊥)modes with out-of-plane polarization at 100 meV of the monolayerh-BN, in contrast to the softening phonon at 90 meV on the pristine system of monolayerh-BN onNi(111). The findings strongly suggest that the interfacial bonds betweenh-BN andNi(111)weaken due to the formation of monolayer graphene.

Keywords: h-BN; graphite; phonon; HREELS; 68.35.Ja; 68.55.Jk; 79.20.Uv; 82.80.Pv (search for similar items in EconPapers)
Date: 2003
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DOI: 10.1142/S0218625X03005529

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