Transport through Graphene on SrTiO<sub>3</sub>

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Title		Transport through Graphene on SrTiO₃
Authors		Guimaraes Couto, Nuno Jose Sacepe, Benjamin Morpurgo, Alberto
Published in		Physical Review Letters. 2011, vol. 107, no. 22
Abstract		We report transport measurements through graphene on SrTiO3 substrates as a function of magnetic field B, carrier density n, and temperature T. The large dielectric constant of SrTiO3 very effectively screens long-range electron-electron interactions and potential fluctuations, making Dirac electrons in graphene virtually noninteracting. The absence of interactions results in an unexpected behavior of the longitudinal resistance in the N=0 Landau level and in a large suppression of the transport gap in nanoribbons. The “bulk” transport properties of graphene at B=0 T, on the contrary, are completely unaffected by the substrate dielectric constant.
Identifiers		DOI: 10.1103/PhysRevLett.107.225501
Full text		Article (Published version) (1 MB) - Free access
Structures		Faculté des sciences / Section de physique / Groupe de physique appliquée Faculté des sciences / Section de physique / Département de physique de la matière quantique
Citation (ISO format)		GUIMARAES COUTO, Nuno Jose, SACEPE, Benjamin, MORPURGO, Alberto. Transport through Graphene on SrTiO₃. In: Physical Review Letters, 2011, vol. 107, n° 22. doi: 10.1103/PhysRevLett.107.225501 https://archive-ouverte.unige.ch/unige:34969