Electronic structure of ferromagnetic semiconductor Ga1-xMnxAs probed by sub-gap magneto-optical spectroscopyElectronic

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Research Institute Physical Review Letters
Creator Scarpulla, Michael
Other Author G. Acbas; M.-H. Kim; M. Cukr; V. Novak; O. D. Dubon; T. Jungwirth; Jairo Sinova; J. Cerne
Title Electronic structure of ferromagnetic semiconductor Ga1-xMnxAs probed by sub-gap magneto-optical spectroscopyElectronic
Date 2009
Description We employ Faraday and Kerr effect spectroscopy in the infrared range to investigate the electronicstructure ofGa1#1;xMnxAsnear the Fermi energy. The band structure of this archetypical dilute-momentferromagnetic semiconductor has been a matter of controversy, fueled partly by previous measurements ofthe unpolarized infrared absorption and their phenomenological impurity-band interpretation. Unlike theunpolarized absorption, the infrared magneto-optical effects we study are intimately related to ferromag-netism, and their interpretation is much more microscopically constrained in terms of the orbital characterof the relevant band states. We show that the conventional theory of the disordered valence band with anantiferromatnetic exchange term accounts semiquantitatively for the overall characteristics of themeasured infrared magneto-optical spectra.
Type Text
Publisher American Physical Society
Volume 103(13)
Issue 137201
First Page 1
Last Page 4
DOI http://dx.doi.org/10.1103/PhysRevLett.103.137201
Language eng
Format Medium application/pdf
ARK ark:/87278/s6k69gm4
Setname ir_uspace
Date Created 2019-11-26
Date Modified 2021-05-06
ID 1487244
Reference URL https://collections.lib.utah.edu/ark:/87278/s6k69gm4
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