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Polarization Selection Rules for Inter-Landau-Level Transitions in Epitaxial Graphene Revealed by the Infrared Optical Hall Effect
University of Nebraska, NE USA.
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, The Institute of Technology.
ABB Inc, VA USA.
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2013 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 111, no 7, e077402- p.Article in journal (Refereed) Published
Abstract [en]

We report on the polarization selection rules of inter-Landau-level transitions using reflection-type optical Hall effect measurements from 600 to 4000  cm-1 on epitaxial graphene grown by thermal decomposition of silicon carbide. We observe symmetric and antisymmetric signatures in our data due to polarization preserving and polarization mixing inter-Landau-level transitions, respectively. From field-dependent measurements, we identify that transitions in coupled graphene monolayers are governed by polarization mixing selection rules, whereas transitions in decoupled graphene monolayers are governed by polarization preserving selection rules. The selection rules may find explanation by different coupling mechanisms of inter-Landau-level transitions with free charge carrier magneto-optic plasma oscillations.

Place, publisher, year, edition, pages
American Physical Society , 2013. Vol. 111, no 7, e077402- p.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-97444DOI: 10.1103/PhysRevLett.111.077402ISI: 000323159500011OAI: oai:DiVA.org:liu-97444DiVA: diva2:647850
Note

Funding Agencies|Army Research Office|W911NF-09-C-0097|National Science Foundation|MRSEC DMR-0820521MRI DMR-0922937EPS-1004094DMR0907475|University of Nebraska-Lincoln||J. A. Woollam Foundation||Office of Naval Research||Swedish Research Council (VR)|20103848|Swedish Governmental Agency for Innovation Systems (VINNOVA) under the VINNMER international qualification program|2011-03486|

Available from: 2013-09-12 Created: 2013-09-12 Last updated: 2017-12-06

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Darakchieva, VanyaYakimova, Rositsa

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