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Interband transmission in armchair graphene ribbons with a step-like profile of potential energy: Relevance to Kleins tunneling
Bogolyubov Inst Theoret Phys, UA-03680 Kiev, Ukraine.
Natl Taras Shevchenko Univ Kyiv, UA-03022 Kiev, Ukraine.
Linköping University, Department of Physics, Chemistry and Biology. Linköping University, The Institute of Technology.
2009 (English)In: Physica status solidi. B, Basic research, ISSN 0370-1972, E-ISSN 1521-3951, Vol. 246, no 11-12, 2549-2552 p.Article in journal (Refereed) Published
Abstract [en]

Three principal results concerning graphene-based wires and their ambipolar behavior are presented. First, it is the exact expression of the transmission coefficient for armchair graphene wires described by the tight-binding Hamiltonian with the step-like change U of site energies. Second, the exact relation between the energy of incident electrons or holes and potential U at which there is no backscattering for the given mode of the transverse motion. Third, the range of relevance of Kleins formula describing the motion of relativistic particles in the same potential profile is established. Analysis of newly derived results shows that physics of interband transitions at constant energy in graphene wires is richer than it was believed.

Place, publisher, year, edition, pages
2009. Vol. 246, no 11-12, 2549-2552 p.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:liu:diva-52869DOI: 10.1002/pssb.200982310OAI: oai:DiVA.org:liu-52869DiVA: diva2:285786
Available from: 2010-01-13 Created: 2010-01-12 Last updated: 2011-01-11

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Onipko, Alexander

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