Magnetic circular dichroism in ZnSe/Ga1-xMnxAs hybrid structures with Be and Si co-doping

Magnetic circular dichroism (MCD) experiments were performed on Ga1-xMnxAs samples with a wide range of Mn and free carrier concentrations. We studied two types of samples: a series consisting of undoped Ga1-xMnxAs with x ranging from 0.008 up to 0.06; and a series of Ga1-xMnxAs with a fixed Mn cont...

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Main Authors: Chakarvorty, R, Yee, K J, Liu, X, Redlinski, P, Kutrowski, M, Titova, L V, Wojtowicz, T, Furdyna, J K, Janko, B, Dobrowolska, M
Format: Conference Proceeding
Language:English
Online Access:Get full text
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Summary:Magnetic circular dichroism (MCD) experiments were performed on Ga1-xMnxAs samples with a wide range of Mn and free carrier concentrations. We studied two types of samples: a series consisting of undoped Ga1-xMnxAs with x ranging from 0.008 up to 0.06; and a series of Ga1-xMnxAs with a fixed Mn content (x = 0.01) and different levels of Be or Si co-doping. The observed dependence of MCD on photon energy, magnetic field, and temperature could not be described by the k*p model and the Moss-Burstein effect. The results suggest that a more general model involving band renormalization may be required to understand MCD in magnetic Ga1-xMnxAs alloys.
ISSN:0094-243X
DOI:10.1063/1.1994606