Origin of magnetic circular dichroism in GaMnAs: giant zeeman splitting versus spin dependent density of states.
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.
Berciu
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M
Department of Physics and Astronomy, University of British Columbia, Vancouver, BC, V6T 1Z1, Canada.
Chakarvorty
R
R
Zhou
Y Y
YY
Alam
M T
MT
Traudt
K
K
Jakiela
R
R
Barcz
A
A
Wojtowicz
T
T
Liu
X
X
Furdyna
J K
JK
Dobrowolska
M
M