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Science 12 July 1996:
Vol. 273. no. 5272, pp. 226 - 228
DOI: 10.1126/science.273.5272.226
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Reports

Formation of Atomically Flat Silver Films on GaAs with a "Silver Mean" Quasi Periodicity

Arthur R. Smith, Kuo-Jen Chao, Qian Niu, Chih-Kang Shih *

A flat epitaxial silver film on a gallium arsenide [GaAs(110)] surface was synthesized in a two-step process. Deposition of a critical thickness of silver at low temperature led to the formation of a dense nanocluster film. Upon annealing, all atoms rearranged themselves into an atomically flat film. This silver film has a close-packed (111) structure modulated by a "silver mean" quasi-periodic sequence. The ability to grow such epitaxial overlayers of metals on semiconductors enables the testing of theoretical models and provides a connection between metal and semiconductor technologies.

Department of Physics, University of Texas at Austin, Austin, TX 78712, USA.
* To whom correspondence should be addressed.


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