Optical and magneto-optical spectroscopy of thin composite GaAs-MnAs layers |
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| Authors: | E. A. Ganshina L. L. Golik V. I. Kovalev Z. E. Kunkova M. V. Vashuk O. V. Vikhrova B. N. Zvonkov Yu. N. Saf’yanov A. I. Suchkov |
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| Affiliation: | (1) Moscow State University, Leninskie gory, Moscow, 119992, Russia;(2) Institute of Radio Engineering and Electronics (Fryazino Branch), Russian Academy of Sciences, pl. Vvedenskogo 1, Fryazino, Moscow oblast, 141190, Russia;(3) Institute for Theoretical and Applied Electrodynamics, Russian Academy of Sciences, Igorskaya ul. 13/19, Moscow, 127412, Russia;(4) Physicotechnical Research Institute, Nizhni Novgorod State University, Nizhni Novgorod, 603600, Russia;(5) Nizhni Novgorod State University, pr. Gagarina 23, Nizhni Novgorod, 603950, Russia;(6) Institute of Chemistry of High-Purity Substances, Russian Academy of Sciences, ul. Tropinina 49, Nizhni Novgorod, 603600, Russia |
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| Abstract: | Ellipsometric and magneto-optical investigations of MnAs layers and GaAs-MnAs composites obtained by laser deposition have been performed in the energy range 1.0–4.5 eV. The spectra of the equatorial Kerr effect (EKE) and the refractive and absorption indices have been studied. Diagonal and off-diagonal components of the dielectric tensor have been calculated. It is established that the shape of the EKE spectra of MnAs layers depends on the crystallographic orientation of these layers. Features near 1.9, 3, and 4 eV are distinguished in the energy dependences of the interband density of states of the layers; these features correspond to the energies of interband d-p transitions, obtained from calculations of the MnAs band structure. |
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