Angular and temperature dependence of the LEED Kikuchi pattern intensity

Abstract

Kikuchi patterns obtained from MgO (001) cleaved faces with primary electron energy of 1500 eV are studied both theoretically and experimentally. In particular, the temperature dependence and the primary beam angular dependence of the Kikuchi pattern intensity is recorded using a movable Faraday cage. Besides the primary beam diffraction effects are studied separately by measuring the integrated backscattered intensity using the screen as collector. The results are interpreted by the Kikuchi pattern theory used in a previous paper. Nevertheless, this theory is improved here by taking account of normal and anomalous absorption and by introducing a new term which results from the interference of the two Bloch waves. This term explains the disappearance of the Kikuchi bands when their indexes are increased and gives a better agreement with temperature dependence experiments.

Forward focusing of Auger and Kikuchi electrons for surface structure determination: Ni(100) and oxidized Mg(0001)

“…In this paper, we start by investigating the same phenomenon with a different source of electrons: inelastically scattered electrons of similar energies, which can be called Kikuchi electrons to reflect the importance of s~ubsequent to their energy loss [9]. Several other authors [10], [11], [12], [13] have also investigated Kikuchi electrons. Gomoyunova et al [10] correctly interpreted angular Kikuchi electron distributions for Mo(100) in terms of peaks due to electrons emitted preferentially along atomic chains, but…”