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Current-voltage characteristics of graphene devices: Interplay between Zener-Klein tunneling and defects

AuthorsBarreiro, Amelia ; Bachtold, Adrian ; Mauri, Francesco
Issue Date2010
PublisherAmerican Physical Society
CitationPhysical Review B 82(4): 045416 (2010)
AbstractWe report a theoretical/experimental study of current-voltage characteristics (I-V) of graphene devices near the Dirac point. The I-V can be described by a power law (I∝Vα with 1<α≤1.5). The exponent is higher when the mobility is lower. This superlinear I-V is interpreted in terms of the interplay between Zener-Klein transport, that is tunneling between different energy bands, and defect scattering. Surprisingly, the Zener-Klein tunneling is made visible by the presence of defects.
Description10 páginas, 12 figuras.-- PACS number(s): 72.80.Rj, 72.10.Fk, 73.50.Dn, 73.61.Wp.-- et al.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevB.82.045416
Appears in Collections:(CIN2) Artículos
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