Electronic Transport in Ion Gel-Gated Strontium Titanate

ORAL

Abstract

In recent years much attention has been focused on the structure and properties of two-dimensional electron liquids (2DEL) in complex oxide heterostrucutres and delta- doped layers. We report on the fabrication and measurements of mesoscopic devices of metal oxides, with focus given to an electric field-induced 2DEL at the surface of undoped strontium titanate (STO). We describe the design and fabrication of field- effect structures, gated with an ionic gel, and show the measurements of induced swings of charge carrier density in STO. Other transport properties of the 2DEL are studied by magneto-transport measurements at low temperature.

*Studies of 2DELs in oxides were supported by MURI program of the ARO (W911-NF-09-1-0398). Development of electrolytic gating was supported by the DOE, Office of Basic Energy Sciences as part of an Energy Frontier Research Center (DE-SC0001060).

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Authors

  • Men Young Lee

    • Stanford University

  • James R. Williams

    • Stanford University

  • David Goldhaber-Gordon

    • Stanford University

  • Sipei Zhang

    • University of Minnesota

  • C. Daniel Frisbie

    • University of Minnesota
    • Department of Chemical Engineering and Material Science, University of Minneosta
    • Department of Chemical Engineering and Materials Science, University of Minnesota

  • Bharat Jalan

    • University of California, Santa Barbara
    • UC Santa Barbara

  • Junwoo Son

    • UC Santa Barbara
    • University of California, Santa Barbara

  • Susanne Stemmer

    • Materials Department, UCSB
    • Materials Department, University of CA, Santa Barbara
    • Materials Dept., UCSB
    • University of California, Santa Barbara
    • UC Santa Barbara