1203.1853 (M. Berciu et al.)

Origin of Magnetic Circular Dichroism in GaMnAs: Giant Zeeman Splitting
versus Spin Dependent Density of States    [PDF]

M. Berciu, R. Chakarvorty, Y. Y. Zhou, M. T. Alam, K. Traudt, R. Jakiela, A. Barcz, T. Wojtowicz, X. Liu, J. K. Furdyna, M. Dobrowolska

We present a unified interpretation of experimentally observed magnetic circular dichroism (MCD) in the ferromagnetic semiconductor (Ga,Mn)As, based on theoretical arguments, which demonstrates that MCD in this material arises primarily from a difference in the density of spin-up and spin-down states in the valence band brought about by the presence of the Mn impurity band, rather than being primarily due to the Zeeman splitting of electronic states.

View original: http://arxiv.org/abs/1203.1853