Mobilities and scattering times in decoupled graphene monolayers

authored by

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.

Organisation(s)

Institute of Solid State Physics

Type

Article

Journal

Physical Review B - Condensed Matter and Materials Physics

Volume

81

ISSN

1098-0121

Publication date

02.03.2010

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials, Condensed Matter Physics

Electronic version(s)

https://doi.org/10.1103/PhysRevB.81.121403 (Access: Unknown)