Adsorption and Absorption of Nitrogen on a W(001) Surface Studied by Thermal Desorption Spectroscopy
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概要
- 論文の詳細を見る
The adsorption states of nitrogen on a W(001) surface, particularly the $\beta_{1}$ state appearing at high coverage, have been studied by two new approaches based on thermal desorption spectroscopy (TDS). First, the isotope 15N was used to discriminate the $\beta_{1}$ state from the $\beta_{2}$ state saturated with 14N at low coverage. It is proposed for the $\beta_{1}$ state formation that 15N exposed later stamps 14N into the octahedral site of the subsurface mainly through single steps around which the atomic distance is extended by nitrogen-induced contracted islands. Secondly, a vicinal surface was investigated to elucidate the role of the steps. Only a small $\beta_{1}$ peak was found, which is interpreted to be a result of suppressed formation of contracted islands due to a large number of surface defects. Other features observed on the vicinal surface are well explained with the proposed model.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2004-04-15
著者
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Koide Tsuneharu
Kek-pf
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Shudo Ken-ichi
Department Of Physics Faculty Of Engineering Yokohama National University
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Fukutani Katsuyuki
Institute For Industrial Science The University Of Tokyo
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Kanama Daisuke
Department Of Materials Science Yokohama National University
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Tanaka Masatoshi
Department Of Comprehensive Management Matsumoto University
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Fukutani Katsuyuki
Institute of Industrial Science, University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8505, Japan
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Shudo Ken-ichi
Department of Physics, Faculty of Engineering, Yokohama National University, Hodogaya-ku, Yokohama 240-8501, Japan
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Matsuoka Hironori
NEC Aerospace systems, Ikebe-cho, Tsuzuki-ku, Yokohama 224-0053, Japan
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Kanama Daisuke
Department of Physics, Faculty of Engineering, Yokohama National University, Hodogaya-ku, Yokohama 240-8501, Japan
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