Phonon dispersion in monolayer graphite formed on Ni(111) and Ni(001)

Takashi Aizawa; Ryutaro Souda; Yoshio Ishizawa; Hideki Hirano; Taro Yamada; Ken ichi Tanaka; Chuhei Oshima

doi:10.1016/0039-6028(90)90531-C

Phonon dispersion in monolayer graphite formed on Ni(111) and Ni(001)

Takashi Aizawa^*, Ryutaro Souda, Yoshio Ishizawa, Hideki Hirano, Taro Yamada, Ken ichi Tanaka, Chuhei Oshima

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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Abstract

The phonon dispersion relations of monolayer graphite on Ni(111) and on Ni(001) were measured by using electron energy loss spectroscopy. Both samples gave almost the same results. The data were analysed with a force constant model in a slab geometry, and it was revealed that the vertical bond bending force constant and the bond twisting force constant were greatly softened. These force-constant changes are comparable with the previously reported case of monolayer graphite on (111) surfaces of transition-metal carbides. However, the interaction between the Ni substrate and the graphite overlayer is not so strong as that on the carbide (111) surface. The similar phonon structures between graphitic layers on Ni(111) and on Ni(001) suggest that both substrates have similar charge transfer capability.

Original language	English
Pages (from-to)	194-202
Number of pages	9
Journal	Surface Science
Volume	237
Issue number	1-3
DOIs	https://doi.org/10.1016/0039-6028(90)90531-C
Publication status	Published - 1990 Nov 1

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Condensed Matter Physics
Surfaces and Interfaces

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title = "Phonon dispersion in monolayer graphite formed on Ni(111) and Ni(001)",

abstract = "The phonon dispersion relations of monolayer graphite on Ni(111) and on Ni(001) were measured by using electron energy loss spectroscopy. Both samples gave almost the same results. The data were analysed with a force constant model in a slab geometry, and it was revealed that the vertical bond bending force constant and the bond twisting force constant were greatly softened. These force-constant changes are comparable with the previously reported case of monolayer graphite on (111) surfaces of transition-metal carbides. However, the interaction between the Ni substrate and the graphite overlayer is not so strong as that on the carbide (111) surface. The similar phonon structures between graphitic layers on Ni(111) and on Ni(001) suggest that both substrates have similar charge transfer capability.",

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T1 - Phonon dispersion in monolayer graphite formed on Ni(111) and Ni(001)

AU - Aizawa, Takashi

AU - Souda, Ryutaro

AU - Ishizawa, Yoshio

AU - Hirano, Hideki

AU - Yamada, Taro

AU - Tanaka, Ken ichi

AU - Oshima, Chuhei

PY - 1990/11/1

Y1 - 1990/11/1

N2 - The phonon dispersion relations of monolayer graphite on Ni(111) and on Ni(001) were measured by using electron energy loss spectroscopy. Both samples gave almost the same results. The data were analysed with a force constant model in a slab geometry, and it was revealed that the vertical bond bending force constant and the bond twisting force constant were greatly softened. These force-constant changes are comparable with the previously reported case of monolayer graphite on (111) surfaces of transition-metal carbides. However, the interaction between the Ni substrate and the graphite overlayer is not so strong as that on the carbide (111) surface. The similar phonon structures between graphitic layers on Ni(111) and on Ni(001) suggest that both substrates have similar charge transfer capability.

AB - The phonon dispersion relations of monolayer graphite on Ni(111) and on Ni(001) were measured by using electron energy loss spectroscopy. Both samples gave almost the same results. The data were analysed with a force constant model in a slab geometry, and it was revealed that the vertical bond bending force constant and the bond twisting force constant were greatly softened. These force-constant changes are comparable with the previously reported case of monolayer graphite on (111) surfaces of transition-metal carbides. However, the interaction between the Ni substrate and the graphite overlayer is not so strong as that on the carbide (111) surface. The similar phonon structures between graphitic layers on Ni(111) and on Ni(001) suggest that both substrates have similar charge transfer capability.

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Phonon dispersion in monolayer graphite formed on Ni(111) and Ni(001)

Abstract

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