Transport of Massless Dirac Fermions in Non-topological Type Edge States

There are two types of intrinsic surface states in solids. The first type is formed on the surface of topological insulators. Recently, transport of massless Dirac fermions in the band of “topological” states has been demonstrated. States of the second type were predicted by Tamm and Shockley long a...

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Bibliographic Details
Published in:Scientific reports 2014-12, Vol.4 (1), p.7578-7578, Article 7578
Main Authors: Latyshev, Yu I., Orlov, A. P., Volkov, V. A., Enaldiev, V. V., Zagorodnev, I. V., Vyvenko, O. F., Petrov, Yu V., Monceau, P.
Format: Article
Language:English
Subjects:
639/766/119/544
639/925/918/1052
Condensed Matter
Conductivity
Experiments
Graphene
Graphite
Humanities and Social Sciences
Magnetic fields
Materials Science
multidisciplinary
Nanowires
Oscillations
Physics
Science
Semiconductors
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Summary:There are two types of intrinsic surface states in solids. The first type is formed on the surface of topological insulators. Recently, transport of massless Dirac fermions in the band of “topological” states has been demonstrated. States of the second type were predicted by Tamm and Shockley long ago. They do not have a topological background and are therefore strongly dependent on the properties of the surface. We study the problem of the conductivity of Tamm-Shockley edge states through direct transport experiments. Aharonov-Bohm magneto-oscillations of resistance are found on graphene samples that contain a single nanohole. The effect is explained by the conductivity of the massless Dirac fermions in the edge states cycling around the nanohole. The results demonstrate the deep connection between topological and non-topological edge states in 2D systems of massless Dirac fermions.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep07578