Atomic Structure of Monolayer Graphite Formed on Ni(111)

Yasuo GAMO; Ayato NAGASHIMA; Masaru WAKABAYASHI; Masayuki TERAI; Chuhei OSHIMA

doi:10.1380/jsssj.17.745

Yasuo GAMO, Ayato NAGASHIMA, Masaru WAKABAYASHI, Masayuki TERAI, Chuhei OSHIMA

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JOURNAL FREE ACCESS

1996 Volume 17 Issue 12 Pages 745-749

DOI https://doi.org/10.1380/jsssj.17.745

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Published: December 10, 1996 Received: May 22, 1996 Available on J-STAGE: August 07, 2009 Accepted: July 15, 1996 Advance online publication: - Revised: -
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Date of correction: August 07, 2009 Reason for correction: - Correction: ABSTRACT Details: Wrong : The atomic structure of monolayer graphite formed on a Ni (111) surface was investigated by means of LEED intensity analysis. We measured the I-V curves of the (1, 0), (0, 1) and (1, 1) diffraction spots from a 1×1 atomic structure, and analyzed them by using the Van Hove's analytical program based on dynamical theory. Three different atomic structures meeting the experimental requirement of the 3-m symmetry were evaluated with Pendry's reliability factor. The final best-fit structure characterized by the minimum Pendry's reliability factor of 0.22 is as follows; one carbon atom in a unit cell of the graphite overlayer is located at the on-top site of the topmost Ni atoms, while another carbon atom exists at the fcc-hollow site. The spacing between the flat overlayer and the topmost Ni layer is 2.11 ± 0.07 Å, which is much narrower than the interlayer spacing in bulk graphite (3.35 Å).
Right : The atomic structure of monolayer graphite formed on a Ni (111) surface was investigated by means of LEED intensity analysis. We measured the I-V curves of the (1, 0), (0, 1) and (1, 1) diffraction spots from a 1×1 atomic structure, and analyzed them by using the Van Hove's analytical program based on dynamical theory. Three different atomic structures meeting the experimental requirement of the 3-m symmetry were evaluated with Pendry's reliability factor. The final best-fit structure characterized by the minimum Pendry's reliability factor of 0.22 is as follows; one carbon atom in a unit cell of the graphite overlayer is located at the on-top site of the topmost Ni atoms, while another carbon atom exists at the fcc-hollow site. The spacing between the flat overlayer and the topmost Ni layer is 2.11 ± 0.07 Å, which is much narrower than the interlayer spacing in bulk graphite (3.35 Å).

Abstract

The atomic structure of monolayer graphite formed on a Ni (111) surface was investigated by means of LEED intensity analysis. We measured the I-V curves of the (1, 0), (0, 1) and (1, 1) diffraction spots from a 1×1 atomic structure, and analyzed them by using the Van Hove's analytical program based on dynamical theory. Three different atomic structures meeting the experimental requirement of the 3-m symmetry were evaluated with Pendry's reliability factor. The final best-fit structure characterized by the minimum Pendry's reliability factor of 0.22 is as follows; one carbon atom in a unit cell of the graphite overlayer is located at the on-top site of the topmost Ni atoms, while another carbon atom exists at the fcc-hollow site. The spacing between the flat overlayer and the topmost Ni layer is 2.11 ± 0.07 Å, which is much narrower than the interlayer spacing in bulk graphite (3.35 Å).

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