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Transport through Graphene on SrTiO3

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.
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Research group Groupe Morpurgo
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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

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Deposited on : 2014-03-25

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