Breaking electron pairs in pseudogap state in SmTiO3/SrTiO3/SmTiO3 quantum wells

ORAL

Abstract

Pseudogap behavior has recently been found in strongly confined SmTiO3/SrTiO3/SmTiO3 quantum wells (Marshall et al, PRL 117, 046402 (2016)). We employ low-temperature transport measurements on SmTiO3/SrTiO3/SmTiO3 Hall bar structures to determine if this phase can be associated with the formation of a paired electron liquid phase. We drive a portion of the device out of equilibrium with voltages that exceed the pseudogap energy and measure the resulting longitudinal and Hall conductance. A unidirectional change in conductance is observed when the pair-breaking drive amplitude exceeds a critical value, providing evidence for the existence of long-lived quasiparticle excitations.

–

Presenters

  • Xinyi Wu

    Physics and Astronomy, Univ of Pittsburgh

Authors

  • Xinyi Wu

    Physics and Astronomy, Univ of Pittsburgh

  • Jianan Li

    Physics, Univ of Pittsburgh, Physics and Astronomy, University of Pittsburgh, Department of Physics and Astronomy, Univ of Pittsburgh, Physics, University of Pittsburgh, University of Pittsburgh, Physics and Astronomy, Univ of Pittsburgh

  • Megan Briggeman

    Physics and Astronomy, Univ of Pittsburgh, Department of Physics and Astronomy, University of Pittsburgh

  • Patrick Marshall

    Univ of California - Santa Barbara, UC Santa Barbara, Materials, Univ of California - Santa Barbara, Materials, Univ of California, Santa Barbara

  • Susanne Stemmer

    ENMT, Materials Department, Univ of California - Santa Barbara, Univ of California - Santa Barbara, UC Santa Barbara, ENMT, Materials Department, Univeristy of California Santa Barbara, Materials, University of California, Santa Barbara, Material Science, University of California, Santa Barbara, Materials Department, University of California Santa Barbara, Materials Department, Univ of California - Santa Barbara, Materials, Univ of California - Santa Barbara, Materials, Univ of California, Santa Barbara

  • Patrick Irvin

    Univ of Pittsburgh, University of Pittsburgh, Physics and Astronomy, University of Pittsburgh, Department of Physics and Astronomy, Univ of Pittsburgh, Department of Physics and Astronomy, University of Pittsburgh, Physics, University of Pittsburgh, Physics and Astronomy, Univ of Pittsburgh

  • Jeremy Levy

    Univ of Pittsburgh, Physics, Univ of Pittsburgh, University of Pittsburgh, Physics and Astronomy, University of Pittsburgh, Department of Physics and Astronomy, Univ of Pittsburgh, Department of Physics and Astronomy, University of Pittsburgh, Physics, University of Pittsburgh, Physics and Astronomy, Univ of Pittsburgh