Direct measurement of crystal surface stress

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Direct measurement of crystal surface stress

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Title: Direct measurement of crystal surface stress
Author: Martinez, Robert; Augustyniak, Walter; Golovchenko, Jene Andrew

Note: Order does not necessarily reflect citation order of authors.

Citation: Martinez, Robert, Walter Augustyniak, and Jene Golovchenko. 1990. Direct Measurement of Crystal Surface Stress. Physical Review Letters 64, no. 9: 1035–1038. doi:10.1103/physrevlett.64.1035.
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Abstract: We have measured surface stresses on clean Si(111) 7×7 by comparing this surface to a reference surface on which gallium atoms are adsorbed under UHV conditions. Stresses are determined by optically measuring the macroscopic strain induced in thin samples. We find a surface stress of 2.37 eV/(1×1 cell) for Si(111) 7×7, and a stress in the range 0.90–1.09 eV/(1×1 cell) for the Si(Ga) (111) superlattice associated with one monolayer Ga coverage. Comparison with theory suggests that our technique will be a powerful tool to measure equilibrium stresses in atomically clean surfaces.
Published Version: doi:10.1103/PhysRevLett.64.1035
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