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Calculations of RHEED and RHEPD Rocking Curves for Growing Surfaces of Germanium

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Reflection high energy electron diffraction is a popular technique to characterize arrangements of atoms near a surface. However, Japanese researchers recently demonstrated experiments in the same geometry, however, conducted using positrons. In this context, detailed comparisons of basic results expected for diffractions of electrons and positrons seem to be interesting. Subsequently, in the current work the growth of single atomic layers of Ge on the Ge(001) substrate is assumed and intensities of reflected beams for electrons and positrons are computed by using dynamical diffraction theory for the case of the off-symmetry azimuth. Shapes of respective theoretical rocking curves are analyzed and then the features of intensity oscillations expected during the regular, continuous deposition of the material are discussed.
  • AGH University of Science and Technology, Faculty of Metals Engineering and Industrial Computer Sci., al. A. Mickiewicza 30, 30-059 Kraków, Poland
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