Abstract
The precise locations of Sb atoms for the $\mathrm{GaAs}(001):\mathrm{S}\mathrm{b}\ensuremath{-}(2\ifmmode\times\else\texttimes\fi{}4)$ surface were measured by the x-ray standing-wave (XSW) technique. The XSW results are consistent with symmetric Sb dimers, whose formation has recently been predicted by four competing models. The (004) and (022) XSW analysis determined the Sb dimer height and bond length to be 1.72 and 2.84 \AA{}, respectively. The Sb coverage of the $(2\ifmmode\times\else\texttimes\fi{}4)$ reconstruction was measured by Rutherford backscattering to be 0.48 monolayers. This coverage agrees with the two proposed structural models that have two Sb dimers per $(2\ifmmode\times\else\texttimes\fi{}4)$ unit cell and disagrees with the models that propose one or three Sb dimers. Finally, a (111) XSW measurement, which tested for lateral displacement of the Sb dimers in the [110] direction, was used to discriminate between the remaining two models.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
