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- W2061483721 abstract "The analysis of the dynamics of equilibrium step fluctuations has been extended to a chemically heterogeneous surface. The multicomponent reconstructed Al/Si(111)-($sqrt{3}$ifmmodetimeselsetexttimesfi{}$sqrt{3}$) surface has been studied using variable-temperature scanning tunneling microscopy at elevated temperatures. The temporal correlation functions for both single steps and step arrays follow a ${t}^{1/2}$ dependence over the entire temperature range (770--1020 K), consistent with a rate limiting mechanism of random attachment and detachment of atoms at step edges. The alternative mechanism, diffusion from step-to-step, is shown to be inconsistent with more detailed analytic approximations to the correlation function for the measured step-step separation. An activation energy of 1.9 eV and the major kinetic parameters that govern surface mass transport and step equilibration processes have been determined." @default.
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- W2061483721 date "2002-08-29" @default.
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- W2061483721 title "Dynamics of step fluctuations on a chemically heterogeneous surface of Al/Si(111)-(<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msqrt><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msqrt></mml:mrow><mml:mrow><mml:mrow><mml:mrow /></mml:mrow></mml:mrow></mml:math>×<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msqrt><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msqrt></mml:mrow><mml:mrow><mml:mrow><mml:mrow /></…" @default.
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- W2061483721 doi "https://doi.org/10.1103/physrevb.66.085327" @default.
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