Mobilities and scattering times in decoupled graphene monolayers

verfasst von

H. Schmidt, T. Lüdtke, P. Barthold, R. J. Haug

Abstract

Folded single-layer graphene forms a system of two decoupled monolayers being only a few angstroms apart. Using magnetotransport measurements we investigate the electronic properties of the two layers conducting in parallel. We show a method to obtain the mobilities for the individual layers despite them being jointly contacted. The mobilities in the upper layer are significantly larger than in the bottom one indicating weaker substrate influence. This is confirmed by larger transport and quantum scattering times in the top layer. Analyzing the temperature dependence of the Shubnikov-de Haas oscillations, effective masses and corresponding Fermi velocities are obtained yielding reduced values down to 66% in comparison to monolayers.

Organisationseinheit(en)

Institut für Festkörperphysik

Typ

Artikel

Journal

Physical Review B - Condensed Matter and Materials Physics

Band

81

ISSN

1098-0121

Publikationsdatum

02.03.2010

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Elektronische, optische und magnetische Materialien, Physik der kondensierten Materie

Elektronische Version(en)

https://doi.org/10.1103/PhysRevB.81.121403 (Zugang: Unbekannt)