Metallic interface in non-SrTiO$_3$ based titanate superlattice

ORAL

Abstract

We report on the fabrication of all perovskite Mott insulator/band insulator YTiO$_3$/CaTiO$_3$ superlattices by pulsed laser deposition. The combination of {\it{in-situ}} reflection high energy electron diffraction, X-ray diffraction and X-ray reflectivity confirms the high quality of the films grown in a layer-by-layer mode. Electrical transport measurements reveal that a non-SrTiO$_3$ based two-dimensional electron gas system has formed at the YTiO$_3$/CaTiO$_3$ interface. These studies offer another route in the pursuit of complex oxide two-dimensional electron gas systems which allows to obtain greater insights into the exotic many-body phenomena at such interfaces.

*J.C. is supported by the Gordon and Betty Moore Foundation's EPiQS Initiative through Grant GBMF4534. S.M. is supported by the DOD-ARO under Grant No. 0402-17291. Y.C. and X.L. acknowledge the support by the Department of Energy grant DE-SC0012375.

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Authors

  • Xiaoran Liu

    • Department of Physics, University of Arkansas, Fayetteville, Arkansas 72701, USA

  • D. Choudhury

    • Department of Physics, Indian Institute of Technology, Kharagpur 721302, India

  • Yanwei Cao

    • Department of Physics, University of Arkansas, Fayetteville, Arkansas 72701, USA

  • M. Kareev

    • Department of Physics, University of Arkansas, Fayetteville, Arkansas 72701, USA

  • S. Middey

    • Department of Physics, University of Arkansas, Fayetteville, Arkansas 72701, USA

  • J. Chakhalian

    • Department of Physics, University of Arkansas, Fayetteville, Arkansas 72701, USA