Identifying the electronic character and role of the Mn states in the valence band of (Ga,Mn)As
cond-mat.str-el
/ Authors
J. Fujii, B. R. Salles, M. Sperl, S. Ueda, M. Kobata, K. Kobayashi, Y. Yamashita, P. Torelli, M. Utz, C. S. Fadley
and 14 more authors
A. X. Gray, J. Minar, J. Braun, H. Ebert, I. Di Marco, O. Eriksson, P. Thunström, G. H. Fecher, S. Ouardi, H. Stryhanyuk, E. Ikenaga, C. H. Back, G. van der Laan, G. Panaccione
/ Abstract
We report high-resolution hard x-ray photoemission spectroscopy results on (Ga,Mn)As films as a function of Mn doping. Supported by theoretical calculations we identify, over the entire 1% to 13% Mn doping range, the electronic character of the states near the top of the valence band. Magnetization and temperature dependent core-level photoemission spectra reveal how the delocalized character of the Mn states enables the bulk ferromagnetic properties of (Ga,Mn)As.