Phonon dispersion curves of stable and metastable B C3 honeycomb epitaxial sheets and their chemical bonding: Experiment and theory

H. Yanagisawa*, T. Tanaka, Y. Ishida, E. Rokuta, S. Otani, C. Oshima

*この研究の対応する著者

研究成果: Article査読

68 被引用数 (Scopus)

抄録

We have investigated experimentally and theoretically the phonon-dispersion curves along the Γ̄ - M̄ axis in two-dimensional surface Brillouin zones of the stable and metastable B C3 honeycomb sheets with different lattice constants. Most of the observed curves agreed with the theoretical ones calculated on the basis of the ab initio theory. There exists a common relationship between the nearest-neighbor stretching force constants and bond lengths of two-dimensional honeycomb structures in various compounds of boron, carbon, and nitrogen; the two-dimensional bonds are discriminated clearly from the one- and three-dimensional bonds. We detected a librational mode of carbon hexagons in B C3; a peculiar mode for a large unit cell of honeycomb sheets such as the 2×2 structure of monolayer graphite and B C3. The restoring force related with the bond bending is insensitive to the change in the B-C bond length.

本文言語English
論文番号045412
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
73
4
DOI
出版ステータスPublished - 2006

ASJC Scopus subject areas

  • 凝縮系物理学

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