TaC(110): a periodic facet reconstruction studied by LEED and STM

J. K. Zuo; D. M. Zehner; J. F. Wendelken; R. J. Warmack; H. N. Yang

doi:10.1016/0039-6028(94)91303-X

TaC(110): a periodic facet reconstruction studied by LEED and STM

J. K. Zuo, D. M. Zehner, J. F. Wendelken, R. J. Warmack, H. N. Yang

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11 Scopus citations

Abstract

A simple model is established to describe diffraction phenomena (LEED) from a unidirectionally reconstructed TaC(110) surface. By comparing diffraction data with results of detailed simulations, the reconstruction is found to consist of alternate (100) and (010) facets propagating periodically along the [110̄] direction like an irregular ridge-and-valley grating, with (110) terraces completely absent. The irregularity is due to variation in facet sizes, and the mean separation is determined to be L = 6 lattice spacings. The validity of this model is supported by STM imaging results which confirm the structure obtained from the LEED-data analysis.

Original language	English
Pages (from-to)	233-244
Number of pages	12
Journal	Surface Science
Volume	301
Issue number	1-3
DOIs	https://doi.org/10.1016/0039-6028(94)91303-X
State	Published - Jan 10 1994
Externally published	Yes

Funding

We thank G.W. Ownby for the sample preparation and G.R. Gruzalski, K. Miiller, and E.D. Williams for useful discussions. Research sponsored by the Division of Materials Sciences, US Department of Energy under contract DE-ACOS-840R21400 with Martin Marietta Energy Systems, Inc., and in part by an appointment to the US Department of Energy Postgraduate Research Program at the Oak Ridge National Laboratory administered by Oak Ridge Associated Universities.

Funders	Funder number
Division of Materials Sciences
U.S. Department of Energy	DE-ACOS-840R21400
Oak Ridge Associated Universities

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title = "TaC(110): a periodic facet reconstruction studied by LEED and STM",

abstract = "A simple model is established to describe diffraction phenomena (LEED) from a unidirectionally reconstructed TaC(110) surface. By comparing diffraction data with results of detailed simulations, the reconstruction is found to consist of alternate (100) and (010) facets propagating periodically along the [11{\=0}] direction like an irregular ridge-and-valley grating, with (110) terraces completely absent. The irregularity is due to variation in facet sizes, and the mean separation is determined to be L = 6 lattice spacings. The validity of this model is supported by STM imaging results which confirm the structure obtained from the LEED-data analysis.",

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AU - Zehner, D. M.

AU - Wendelken, J. F.

AU - Warmack, R. J.

AU - Yang, H. N.

PY - 1994/1/10

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N2 - A simple model is established to describe diffraction phenomena (LEED) from a unidirectionally reconstructed TaC(110) surface. By comparing diffraction data with results of detailed simulations, the reconstruction is found to consist of alternate (100) and (010) facets propagating periodically along the [110̄] direction like an irregular ridge-and-valley grating, with (110) terraces completely absent. The irregularity is due to variation in facet sizes, and the mean separation is determined to be L = 6 lattice spacings. The validity of this model is supported by STM imaging results which confirm the structure obtained from the LEED-data analysis.

AB - A simple model is established to describe diffraction phenomena (LEED) from a unidirectionally reconstructed TaC(110) surface. By comparing diffraction data with results of detailed simulations, the reconstruction is found to consist of alternate (100) and (010) facets propagating periodically along the [110̄] direction like an irregular ridge-and-valley grating, with (110) terraces completely absent. The irregularity is due to variation in facet sizes, and the mean separation is determined to be L = 6 lattice spacings. The validity of this model is supported by STM imaging results which confirm the structure obtained from the LEED-data analysis.

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TaC(110): a periodic facet reconstruction studied by LEED and STM

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