Composition and Morphology of Cu–9% Al(111)-$(\sqrt{3}{\times}\sqrt{3})R30^{\circ}$ Surface
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概要
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Auger electron spectroscopy (AES) and scanning tunneling microscopy (STM) are applied to investigate the composition and morphology of the Cu–9 at. % Al(111)-$(\sqrt{3}{\times}\sqrt{3})R30^{\circ}$ superstructure. We found that the Al concentration on the topmost layer is about 41 at. %. STM reveals that segregated Al atoms are partially consumed to form the $(\sqrt{3}{\times}\sqrt{3})R30^{\circ}$ structure and the excess Al atoms are randomly distributed on the surface. Moreover, STM resolves a superposition of the $(\sqrt{3}{\times}\sqrt{3})R30^{\circ}$ structure and standing waves. The surface Fermi wave number is obtained as $0.39 \pm 0.04$ Å-1 by analyzing the Fourier transform of STM images.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2008-07-25
著者
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Fujita Daisuke
Advanced Nano Characterization Center National Institute For Materials Science
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Sagisaka Keisuke
Advanced Nano Characterization Center, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
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Yu Yinghui
Advanced Nano Characterization Center, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
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Fujita Daisuke
Advanced Nano Characterization Center, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
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