Tunnel and electrostatic coupling in graphene-LaAlO3/SrTiO3 hybrid systems

Aliaj, I.; Torre, I.; Miseikis, V.; di Gennaro, E.; Sambri, A.; Gamucci, A.; Coletti, C.; Beltram, F.; Granozio, F. M.; Polini, M.; Pellegrini, V.; Roddaro, Stefano

doi:10.1063/1.4953821

We report on the transport properties of hybrid devices obtained by depositing graphene on a LaAlO3/SrTiO3 oxide junction hosting a 4 nm-deep 2-dimensional electron system. At low graphene-oxide inter-layer bias, the two electron systems are electrically isolated, despite their small spatial separation. A very efficient reciprocal gating of the two neighboring 2-dimensional systems is shown. A pronounced rectifying behavior is observed for larger bias values and ascribed to the interplay between electrostatic field-effects and tunneling across the LaAlO3 barrier. The relevance of these results in the context of strongly coupled bilayer systems is discussed.

Autori interni:	Aliaj I. Torre I. Miseikis V. di Gennaro E. Sambri A. Gamucci A. Coletti C. Beltram F. Granozio F. M. Polini M. Pellegrini V. RODDARO, STEFANO mostra contributor esterni nascondi contributor esterni
Autori:	Aliaj I.; Torre I.; Miseikis V.; di Gennaro E.; Sambri A.; Gamucci A.; Coletti C.; Beltram F.; Granozio F. M.; Polini M.; Pellegrini V.; Roddaro S.
Titolo:	Tunnel and electrostatic coupling in graphene-LaAlO3/SrTiO3 hybrid systems
Anno del prodotto:	2016
Digital Object Identifier (DOI):	10.1063/1.4953821
Appare nelle tipologie:	1.1 Articolo in rivista

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