Mn distribution and spin polarization in Ga(1-x)Mn x As.
Using the density functional full-potential linearized augmented plane wave approach, the x-ray absorption and magnetic circular dichroism (XMCD) spectra of Ga(1-x)Mn x As are calculated. Significantly, XMCD of Mn is highly sensitive to the change in environment, and thus can be utilized to characterize impurity distribution. The nature of Mn-induced spin polarization on Ga and As sites, vital for the carrier mediated magnetic ordering, is discussed in light of computational and experimental results.
Wu
Ruqian
R
Department of Physics and Astronomy, University of California, Irvine, California 92697-4575, USA.