What can we exactly learn from the XPS measurement of the orientation-resolved surface core level sh

论文发布时间：[2009-09-23] 范文大全编辑：Voive.net

所有作者：孙长庆

作者单位：南洋理工大学电机与电子工程学院

论文摘要：We demonstrated that theoretical reproduction of the Ru(０００１) and Ru(１００) surface X-ray photoelectron emission， for example， can elucidate the following information： (i) the ３d５/２ energy level of an isolated Ru atom = ２７５。８８３刡０。００２ eV； (ii) the positive shift of = ３。６６１ eV from upon bulk formation； (iii) the functional expression for the coordination z resolved energy shift： with being the z-dependant bond contraction coefficient of different layers and orientations； (iv) the effective atomic coordination numbers of the surface layers； (v) the z-dependence of the lattice strain， binding energy density gain， and atomic cohesive energy remnant in the surfaces up to skin depth； and importantly， (vi) the physical origin for the positive core level shift as arise from the perturbation of the Hamiltonian by the shorter and stronger bonds between under-coordinated atoms。

关键词： XPS core level shift surface Ru binding energy

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