The quasi-free-standing nature of graphene on H-saturated SiC(0001)

Speck F, Jobst J, Fromm F, Ostler M, Waldmann D, Hundhausen M, Weber HB, Seyller T (2011)

Publication Type: Journal article, Letter

Publication year: 2011

Journal

Applied Physics Letters American Institute of Physics (AIP)

Publisher: American Institute of Physics (AIP)

Book Volume: 9

Pages Range: 12206

DOI: 10.1063/1.3643034

Abstract

We report on an investigation of quasi-free-standing graphene on 6H-SiC(0001) which was prepared by intercalation of hydrogen under the buffer layer. Using infrared absorption spectroscopy, we prove that the SiC(0001) surface is saturated with hydrogen. Raman spectra demonstrate the conversion of the buffer layer into graphene which exhibits a slight tensile strain and short range defects. The layers are hole doped (p 5.0 - 6.5 1012 cm -2) with a carrier mobility of 3100 cm2/Vs at room temperature. Compared to graphene on the buffer layer, a strongly reduced temperature dependence of the mobility is observed for graphene on H-terminated SiC(0001) which justifies the term quasi-free-standing. © 2011 American Institute of Physics.

Authors with CRIS profile

Florian Speck Lehrstuhl für Laserphysik Johannes Jobst Chair of Applied Physics Felix Fromm Lehrstuhl für Laserphysik Markus Ostler Lehrstuhl für Laserphysik Daniel Waldmann Chair of Applied Physics Martin Hundhausen Lehrstuhl für Laserphysik Heiko Weber Chair of Applied Physics Thomas Seyller Naturwissenschaftliche Fakultät

Additional Organisation(s)

Exzellenz-Cluster Engineering of Advanced Materials

Related research project(s)

None - None

How to cite

APA:

Speck, F., Jobst, J., Fromm, F., Ostler, M., Waldmann, D., Hundhausen, M.,... Seyller, T. (2011). The quasi-free-standing nature of graphene on H-saturated SiC(0001). Applied Physics Letters, 9, 12206. https://dx.doi.org/10.1063/1.3643034

MLA:

Speck, Florian, et al. "The quasi-free-standing nature of graphene on H-saturated SiC(0001)." Applied Physics Letters 9 (2011): 12206.

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