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Site-specific electronic configurations of states by energy loss by channeled electrons
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View: Figures


Image of FIG. 1.
FIG. 1.

(a) Fe and ELNES collected under 15 different diffraction conditions. The spectra are normalized so that the peak maxima of Fe ELNES exhibit the same height. The total exposure time per spectrum was . The energy resolution was 1.0 eV. (b) The DPs corresponding to nos. 1 and 15 spectra in (a). The thick (thin) vertical lines denote the positions of the set of 400 (800) Kikuchi lines. We set a beam convergence semiangle of 4.6 mrad, a collection semiangle of 7.5 mrad, and an EELS entrance aperture off-axis shift of 1.5 .

Image of FIG. 2.
FIG. 2.

Comparison between the theoretical and experimental site-selectivity, with respect to the incident beam orientation, which is represented by a dimensionless parameter , where is the extinction distance of the 400 beam. We set the same aperture conditions as in the experiment.

Image of FIG. 3.
FIG. 3.

Comparison between theoretical and experimental site-specific ELNES. The energy resolution in the experimental spectra was 1.0 eV. The theoretical spectra were obtained by convoluting a 0.6 eV Lorenz function with the discrete transition probabilities so as to show the fine structures clearly.

Image of FIG. 4.
FIG. 4.

Configuration analysis of many-electron wave functions corresponding to the final states of peaks A and B in the edge. Because the basis set of the Slater determinants are orthonormal, using an eigenvector , an electron configuration ’s composition is simply given by .


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Site-specific electronic configurations of Fe 3d states by energy loss by channeled electrons