Thermopower of Quantum Wires at the LaAlO<sub>3</sub>/SrTiO<sub>3</sub> Interface

ORAL

Abstract

We report the electrical and thermoelectric transport properties of quantum wires at the LaAlO3/SrTiO3 interface at milli-Kelvin temperatures. A highly enhanced and oscillating thermopower shows up with values exceeding 100 uV/K in the electron depletion regime. The thermopower is correlated with the band structure in the nanowire and well described by the Mott relation. These findings pave the way to study electronic structures of quantum wires at LaAlO3/SrTiO3 with thermal transport technique and can further lead to the understanding of quantization of thermal conductance and other exotic electronic phases in LaAlO3/SrTiO3 systems.

*Work at the University of Pittsburgh was supported by funding from the DOE Office of Basic Energy Sciences under award number DOE DE-SC0014417. JL acknowledges a Vannevar Bush Faculty Fellowship (ONR N00014-15-1-2847). Work at the University of Wisconsin was supported by funding from the DOE Office of Basic Energy Sciences under award number DE-FG0206ER46327.

–

Presenters

  • Yuhe Tang

    • University of Pittsburgh

Authors

  • Yuhe Tang

    • University of Pittsburgh

  • Puqing Jiang

    • University of Pittsburgh

  • Jungwoo Lee

    • Materials Science and Engineering, University of Wisconsin-Madison
    • University of Wisconsin, Madison
    • Department of Materials Science and Engineering, University of Wisconsin-Madison,, University of Wisconsin
    • University of Wisconsin-Madison
    • University of Wisconsin-Maddison
    • Department of Materials Science and Engineering, University of Wisconsin-Madison

  • Hyungwoo Lee

    • Materials Science and Engineering, University of Wisconsin-Madison
    • University of Wisconsin-Madison
    • University of Wisconsin-Maddison
    • Department of Materials Science and Engineering, University of Wisconsin-Madison

  • Mengchen Huang

    • University of Pittsburgh

  • Chang-Beom Eom

    • Materials Science and Engineering, University of Wisconsin-Madison
    • University of Wisconsin, Madison
    • Department of Materials Science and Engineering, University of Wisconsin-Maddison
    • Department of Materials Science and Engineering, University of Wisconsin
    • Department of Materials Science Engineering, University of Wisconsin-Madison
    • Department of Materials Science and Engineering, University of Wisconsin-Madison,, University of Wisconsin
    • Material Science and Engineering, University of Wisconsin-Madison
    • University of Wisconsin-Madison
    • University of Wisconsin-Maddison
    • University of Wisconsin - Madison
    • University of Wisconsin Madison
    • Department of Materials Science and Engineering, University of Wisconsin-Madison

  • Patrick R Irvin

    • Physics and Astronomy, University of Pittsburgh
    • University of Pittsburgh
    • Department of Physics and Astronomy, University of Pittsburgh
    • Department of Physics & Astronomy, University of Pittsburgh

  • Jeremy Levy

    • Physics and Astronomy, University of Pittsburgh
    • University of Pittsburgh
    • Department of Physics and Astronomy, University of Pittsburgh
    • Department of Physics & Astronomy, University of Pittsburgh