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- W2047177335 abstract "Kinetic processes that affect the formation and ordering of the Ag-induced $c(2ifmmodetimeselsetexttimesfi{}2)$ alloy at the Mo(100) surface have been investigated with low-energy electron microscopy and diffraction. A kinetic limitation to alloy formation, which is believed to be associated with the exchange of Ag for Mo surface atoms, is observed during Ag deposition below about $750phantom{rule{0.3em}{0ex}}mathrm{K}$. The controlling activation barrier is determined to be ${E}_{mathit{ex}}=0.50ifmmodepmelsetextpmfi{}0.17phantom{rule{0.3em}{0ex}}mathrm{eV}$. These investigations also reveal that disorder is built into the alloy during the formation process to a degree that is determined by nucleation kinetics, which are governed by diffusion, and a diffusion barrier of ${E}_{mathit{dif}}=0.25ifmmodepmelsetextpmfi{}0.03phantom{rule{0.3em}{0ex}}mathrm{eV}$ is determined. This low diffusion barrier is attributed to the formation and motion of an intermediate Ag-Mo-vacancy complex prior to exchange. Evidence of desorption is also observed above $950phantom{rule{0.3em}{0ex}}mathrm{K}$ with a characteristic desorption energy of ${E}_{mathit{des}}=2.81ifmmodepmelsetextpmfi{}0.34phantom{rule{0.3em}{0ex}}mathrm{eV}$." @default.
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- W2047177335 date "2006-08-30" @default.
- W2047177335 modified "2023-10-14" @default.
- W2047177335 title "Formation kinetics of the Mo(100)-Ag<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mi>c</mml:mi><mml:mrow><mml:mo>(</mml:mo><mml:mn>2</mml:mn><mml:mo>×</mml:mo><mml:mn>2</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:mrow></mml:math>surface alloy" @default.
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- W2047177335 doi "https://doi.org/10.1103/physrevb.74.085420" @default.
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