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- W2014244152 abstract "The atomic geometry of the As-rich GaAs{001}-c(4ifmmodetimeselsetexttimesfi{}4) surface prepared by molecular-beam epitaxy has been characterized in situ. The focus of the study is to determine how excess As affects the structure of the GaAs{001} surface. We report that the second- and third-interlayer spacings are (1.48ifmmodepmelsetextpmfi{}0.10) and (1.47ifmmodepmelsetextpmfi{}0.10) AA{}, respectively, in comparison to the bulk spacing of 1.41 AA{}. Arsenic atoms in the first layer are observed to be dimerized along the 〈110〉 azimuth with a bond length of (2.69ifmmodepmelsetextpmfi{}0.10) AA{}. Furthermore, evidence is presented that is consistent with a structure which contains both untilted and tilted dimers. The tilting is defined by a rotation about the center of the dimer bond by ifmmodepmelsetextpmfi{}(4.3ifmmode^circelsetextdegreefi{}ifmmodepmelsetextpmfi{}0.5ifmmode^circelsetextdegreefi{}). These results are based on desorbed ${mathrm{Ga}}^{+}$ ion distributions obtained by shadow-cone-enhanced secondary-ion mass spectrometry." @default.
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- W2014244152 date "1995-08-15" @default.
- W2014244152 modified "2023-09-24" @default.
- W2014244152 title "Tilting in the arsenic-inducedc(4×4) reconstruction of the GaAs{001} surface" @default.
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- W2014244152 doi "https://doi.org/10.1103/physrevb.52.5172" @default.
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