Imaging filamentary current flow near the metal-insulator transition in an oxide interface

ORAL

Abstract

In systems near phase transitions, macroscopic properties often follow algebraic scaling laws, determined by the dimensionality and symmetries of the system. The emergence of such universal scaling implies that microscopic details are irrelevant. In my talk, I will discuss the scaling properties of the metal-insulator transition at the LaAlO3/SrTiO3 interface. Using scanning SQUID, we map the current flow at the interface close to the gate tunable transition. I will show that coupling between structural and electronic degrees of freedom modifies the filamentary, preventing a fractal with the expected universal dimension from forming. Our results open the door for engineering electronic transitions at the nanoscale.

*B.K was supported by European Research Council Grant ERC-2019-COG-866236, and Israeli Science Foundation grant ISF-1281/17. J.R was supported by Israeli Science Foundation grant 967/19. A.D.C was supported by European Research Council Grant ERC-2015-STG-677458, and by the Netherlands Organisation for Scientific Research (NWO/OCW) as part of the VIDI program. B.K and A.D.C were supported by the QuantERA Cofund in Quantum Technologies (Project 731473). H.Y.H was supported by the Department of Energy, under contract DE-AC02-76SF00515.

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Presenters

  • Eylon Persky

    • Department of Physics and Institute of Nanotechnology and Advanced Materials, Bar-Ilan University

Authors

  • Eylon Persky

    • Department of Physics and Institute of Nanotechnology and Advanced Materials, Bar-Ilan University

  • Naor Vardi

    • Department of Physics and Institute of Nanotechnology and Advanced Materials, Bar-Ilan University

  • Ana Monteiro

    • Quantum Nanoscience, TU Delft
    • Kavli Institute of Nanoscience, Delft University of Technology

  • Thierry van Thiel

    • Quantum Nanoscience, TU Delft
    • Kavli Institute of Nanoscience, Delft University of Technology
    • Delft University of Technology

  • Hyeok Yoon

    • Department of Applied Physics, Stanford University
    • Standford University

  • Yan-Wu Xie

    • Department of Applied Physics, Stanford University
    • Department of Physics, Zhejiang Univ

  • Benoit Fauque

    • Laboratoire Physique et Etude de Matériaux (CNRS-UPMC), ESPCI Paris, PSL Research University

  • Andrea Caviglia

    • Quantum Nanoscience, TU Delft
    • Kavli Institute of Nanoscience, Delft University of Technology
    • Delft University of Technology

  • Harold Hwang

    • Department of Applied Physics, Stanford University
    • Stanford Institute for Materials and Energy Sciences, SLAC - Natl Accelerator Lab
    • Stanford Univ
    • Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory
    • Stanford University
    • Standford University
    • Stanford Institute for Materials and Energy Sciences, Stanford University and SLAC National Accelerator Laboratory
    • SIMES, SLAC
    • Applied Physics, Stanford University

  • Kamran Behnia

    • Laboratoire Physique et Etude de Matériaux (CNRS-UPMC), ESPCI Paris, PSL Research University

  • Beena Kalisky

    • Department of Applied Physics, Stanford University
    • Bar Ilan University