Dynamics of thermal diffuse scattering in high-energy electron diffraction and imaging : theory and experiments

作者: Z. L. Wang

DOI: 10.1080/13642819208207650

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摘要: Abstract A dynamical theory is proposed to calculate the diffraction patterns of electrons which have undergone thermal diffuse scattering (TDS). The lattice dynamics and electron are comprehensively combined in this approach. Full simulations presented for Mo(001). Under single-inelastic-scattering approximation near-zone-axis case, sharpness TDS streaks determined by phonon dispersion relationships acoustic branches, optical branches contribute only a background, effects can change intensity distribution but almost no effect on streaks. defined qx-qy curves satisfy δi(q)=O, where δi(q) relationship two-dimensional atomic vibrations (hkl) plane perpendicular incident beam direction B = [hkl]. directions predicted according these procedure...

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