Higher Order Laue Zone Asymmetry in Convergent Beam Electron Diffraction Patterns from Zigzagged String Potentials

摘要

The strong azimuthal intensity variation seen in convergent beam electron diffraction (CBED) patterns taken from structures with zigzagged atom strings Ls explained using a simple kinematic model. Four possible zigzagged string potentials are considered and a method is described for extracting atomic positions within the atom string by monitoring the high order Laue zone (HOLZ) intensities as a function of the operating voltage of the microscope. Computer simulations and experimental CBED patterns are used as examples.