Magneto-optic spectrum and electronic structure of single-crystal MnBi |
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| Affiliation: | 1. Department of Physics and Astronomy and Ames Laboratory, USDOE, Iowa State University, Ames IA 50011, USA;1. National Laboratory Astana, 53 Kabanbay Batyr St., 010000 Astana, Kazakhstan;2. National Research Tomsk Polytechnic University, 30 Lenin ave., 634050 Tomsk, Russia;3. International Academy of Optoelectronics at Zhaoqing, South China Normal University, Liyuan Street, 526238 Guangdong, China;4. Indira Gandhi Center for Atomic Research, Metallurgy and Materials Group, Kalpakkam,603102 Tamil Nadu, India;5. Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, 14109 Berlin, Germany;6. Optotransmitter-Umweltschutz-Technologie e.V., 325 Köpenicker Str., 12555 Berlin, Germany;1. IHP, Im Technologiepark 25, 15236 Frankfurt (Oder), Germany;2. Research Institute of Electrical Communication, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan;3. Technische Universität Berlin, HFT4, Einsteinufer 25, 10587 Berlin, Germany;1. Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany;2. Mulliken Center for Theoretical Chemistry, Institut für Physikalische und Theoretische Chemie, Universität Bonn, Beringstr. 4, 53115 Bonn, Germany;3. Lehrstuhl für Technische Chemie, Ruhr-Universität Bochum, Universitätsstr. 150, 44801 Bochum, Germany;4. Institut für Chemie, Carl von Ossietzky Universität Oldenburg, Carl-von-Ossietzky-Str. 9-11, 26129 Oldenburg, Germany |
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| Abstract: | Single crystals of MnBi were used for magneto-optic Kerr-angle spectroscopy and photoelectron spectroscopy. The Kerr-angle peak at 3.35 eV was observed for our nearly oxygen-free bulk samples, but the role of the oxide overlayer, demonstrated by Auger spectroscopy, as a possible origin of this peak cannot fully be assessed. The energy bands from photoelectron spectroscopy were in general agreement with calculated band structures, but were not extensive enough, due to sample cleavage properties, to distinguish reliably between band-structure calculations that disagree. |
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