FORMATION OF$\sqrt {21} \times \sqrt {21} $STRUCTURE BY GOLD DEPOSITION ON${\rm{Si}}\left( {111} \right)\sqrt 3 \times \sqrt 3\mbox{-}{\rm{Ag}}$SURFACE AND THE WAVERING BEHAVIOR

A. Ichimiya, H. Nomura, Y. Horio, T. Sato, T. Sueyoshi and M. Iwatsuki
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A. Ichimiya: Department of Applied Physics, Nagoya University, Chikusa-ku, Nagoya, 464–01, Japan
H. Nomura: Department of Applied Physics, Nagoya University, Chikusa-ku, Nagoya, 464–01, Japan
Y. Horio: Department of Applied Physics, Nagoya University, Chikusa-ku, Nagoya, 464–01, Japan
T. Sato: JEOL Ltd., Akishima, Tokyo 196, Japan
T. Sueyoshi: JEOL Ltd., Akishima, Tokyo 196, Japan
M. Iwatsuki: JEOL Ltd., Akishima, Tokyo 196, Japan

Surface Review and Letters (SRL), 1994, vol. 01, issue 01, 1-7

Abstract: Initial stage of gold deposition on a${\rm{Si}}\left( {111} \right)\sqrt 3 \times \sqrt 3 R30^ \circ \mbox{-}{\rm{Ag}}$surface at room temperature is observed by reflection high-energy electron diffraction (RHEED) and scanning tunneling microscopy (STM). At gold coverage of 0.14 monolayer (ML) (here1 ML=7.8×1014atoms/cm2) a$\sqrt {21} \times \sqrt {21} R\left( { \pm 10.9^ \circ } \right)$structure is formed on the surface. A model of the superstructure is proposed in terms of an embedded arrangement of three gold atoms in the unit cell. Wavering behavior of$\sqrt {21} \times \sqrt {21} $islands formed on the$\sqrt 3 \times \sqrt 3 $structure is found during STM observations.

Date: 1994
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DOI: 10.1142/S0218625X94000023

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