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Decoupling and ordering of multilayer graphene on C-face 3C-SiC(111)
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, Faculty of Science & Engineering.
Lund University, Sweden.
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, Faculty of Science & Engineering. University of Nebraska, USA.
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2016 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 109, no 20, 203102Article in journal (Refereed) Published
Abstract [en]

We show experimentally that few layer graphene (FLG) grown on the carbon terminated surface (C-face) of 3C-SiC(111) is composed of decoupled graphene sheets. Landau level spectroscopy on FLG graphene is performed using the infrared optical Hall effect. We find that Landau level transitions in the FLG exhibit polarization preserving selection rules and the transition energies obey a square-root dependence on the magnetic field strength. These results show that FLG on C-face 3C-SiC(111) behave effectively as a single layer graphene with linearly dispersing bands (Dirac cones) at the graphene K point. We estimate from the Landau level spectroscopy an upper limit of the Fermi energy of about 60 meV in the FLG, which corresponds to a carrier density below 2.5 x 10(11) cm(-2). Low-energy electron diffraction mu-LEED) reveals the presence of azimuthally rotated graphene domains with a typical size of amp;lt;= 200 nm.mu-LEED mapping suggests that the azimuth rotation occurs between adjacent domains within the same sheet rather than vertically in the stack. Published by AIP Publishing.

Place, publisher, year, edition, pages
AMER INST PHYSICS , 2016. Vol. 109, no 20, 203102
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-133111DOI: 10.1063/1.4967525ISI: 000388000000043OAI: oai:DiVA.org:liu-133111DiVA: diva2:1055281
Note

Funding Agencies|Swedish Research Council (VR) [2013-5580, 2014-5805]; Swedish Governmental Agency for Innovation Systems (VINNOVA) under the VINNMER international qualification program [2011-03486]; Swedish foundation for strategic research (SSF) [FFL12-0181, RIF14-055]; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University [2009 00971]; National Science Foundation (NSF) through the Center for Nanohybrid Functional Materials [EPS-1004094]; Nebraska Materials Research Science and Engineering Center [DMR 1420645]; J. A. Woollam Co., Inc.; J. A. Woollam Foundation; [EAR 1521428]

Available from: 2016-12-12 Created: 2016-12-09 Last updated: 2016-12-12

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Semiconductor MaterialsFaculty of Science & EngineeringDepartment of Physics, Chemistry and Biology
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