Dynamics of Lopsided Energy Sharing between a Photoelectron and an Auger Electron in Solids

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概要

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• We study the dynamics of lopsided energy sharing between a photoelectron and an Auger electron in solids. The problem is formulated as an optical response theory, in which the energy distribution spectrum for these two propagating electrons is expressed in terms of T matrices. In order to perform numerical calculations, we use two different models, which are a partial-wave model and a cubic-lattice model. Firstly, we concentrate on the effect given by the change of the atomic valency following the Auger decay. As a result, in the former model we have reproduced the lopsidedness in the peak shifts and distortions of the main peaks. Such lopsidedness is realized even in the latter model in spite of the strong mixing among different partial waves. Furthermore, it should be emphasized that various types of dynamics can occur according to the local electronic structure around the atom of which core electron is excited. In particular, the energy spectrum of the two electrons receive modulations representing the local density of states around the initial atom. This is because the phenomenon is essentially local in the sense that both the electrons must be inside the Coulomb-potential region of the atom for the energy sharing to occur. Next, we study the effect of electron-electron scattering between the two propagating electrons, using a perturbation theory. It is concluded that, when the electron-electron scattering is weak enough, its effect is against the previous one and so reduces the lopsidedness in the energy sharing.

• 社団法人日本物理学会の論文
• 1995-09-15

著者

• Iwano Kaoru

  Photon Faculty National Laboratory High Energy Physics Graduate University For Advanced Studies

• Iwano Kaoru

  Photon Factory National Laboratory For High Energy Physics Graduate University For Advanced Studies

• Nasu Keiichiro

  Photon Factory National Laboratory For High Energy Physics The Graduate University For Advanced Stud

• Nasu Keiichiro

  Photon Factory National Laboratory For High Energy Physics Graduate University For Advanced Studies

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