Surface morphology and growth of AgBr on Ag(111)
| Autor: | A.-B. Yang, S. Liang, Y. T. Tan, James G. Tobin, R. Desouza-Machado, S. Brandt, J.C. Hansen, M. G. Mason, M. K. Wagner, F. C. Brown |
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| Rok vydání: | 1991 |
| Předmět: | |
| Zdroj: | Physical Review B. 43:6405-6410 |
| ISSN: | 1095-3795 0163-1829 |
| DOI: | 10.1103/physrevb.43.6405 |
| Popis: | Angle-resolved photoemission with synchrotron radiation has been used to probe the surface morphologies of AgBr deposited by molecular-beam epitaxy onto Ag(111), as a function of coverage and substrate temperature. Depositions performed at 130 \ifmmode^\circ\else\textdegree\fi{}C yield results consistent with a Stranski-Krastanov (SK) growth, whereas surfaces prepared at liquid-nitrogen temperatures exhibit a more nearly layer-by-layer growth. These interpretations are supported by core-level and valence-band studies, which probed the binding energies and intensities of the Br 3d core level and the Ag(111) surface state. Low-energy electron diffraction observations show the initial SK layer to have a (\ensuremath{\surd}3 \ifmmode\times\else\texttimes\fi{} \ensuremath{\surd}3 )R30\ifmmode^\circ\else\textdegree\fi{} structure, while heavier depositions exhibit indications of AgBr(111) islands. Cold depositions show no long-range order. Surface morphology changes induced by warming a cold deposition were also studied. |
| Databáze: | OpenAIRE |
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