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Identification of Different Electron Screening Behavior Between the Bulk and Surface of (Ga,Mn)As

Fujii, J. ; Sperl, Matthias ; Ueda, S. ; Kobayashi, K. ; Yamashita, Y. ; Kobata, M. ; Torelli, P. ; Borgatti, F. ; Utz, M. ; Fadley, C. S. ; Gray, A. X. ; Monaco, G. ; Back, Christian ; van der Laan, G. ; Panaccione, G.


We report x-ray photoemission spectroscopy results on (Ga,Mn)As films as a function of both temperature and Mn doping. Analysis of Mn 2p core level spectra reveals the presence of a distinct electronic screening channel in the bulk, hitherto undetected in more surface sensitive analysis. Comparison with model calculations identifies the character of the Mn 3d electronic states and clarifies the ...


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