科研之友
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摘要
The electron hole spectral width Gamma(h) of Ti 3d states in layered TiTe2 and the inverse lifetime V-i of the photoelectron final states are determined from experiment within the one-step theory of photoemission. The condition for the possibility of separating the effects of Gamma(h) and V-i is a strongly non-free-electron character of the final states. The resulting drastic changes of the line shape with photon energy are experimentally observed and explained by an ab initio theory. A nonmonotonic dependence of V-i on the final-state energy is observed; it is shown to reveal the real space structure of the complex electron self-energy.
- 出版日期2007-5-25
