title: Two-dimensional superconducting phase in LaTiO3/SrTiO3 heterostructures induced by high-mobility carrier doping.
abstract: In this Letter, we show that a superconducting two-dimensional electron gas is formed at the LaTiO3/SrTiO3 interface whose transition temperature can be modulated by a back-gate voltage. The gas consists of two types of carriers: a majority of low-mobility carriers always present, and a few high-mobility ones that can be injected by electrostatic doping. The calculation of the electron spatial distribution in the confinement potential shows that the high-mobility electrons responsible for superconductivity set at the edge of the gas whose extension can be tuned by the field effect.
authors.affiliation: LPEM-UMR8213/CNRS-ESPCI ParisTech-UPMC, 10 rue Vauquelin-75005 Paris, France.
authors.forename: J
authors.initials: J
authors.lastname: Biscaras
authors.forename: N
authors.initials: N
authors.lastname: Bergeal
authors.forename: S
authors.initials: S
authors.lastname: Hurand
authors.forename: C
authors.initials: C
authors.lastname: Grossetête
authors.forename: A
authors.initials: A
authors.lastname: Rastogi
authors.forename: R C
authors.initials: RC
authors.lastname: Budhani
authors.forename: D
authors.initials: D
authors.lastname: LeBoeuf
authors.forename: C
authors.initials: C
authors.lastname: Proust
authors.forename: J
authors.initials: J
authors.lastname: Lesueur