Localization of Filaments in Resistive Switching Devices by Ion Irradiation

ORAL

Abstract

Resistive switching (RS) in transition metal oxides could find applications in a wide range of electronic devices, from conventional binary memories to artificial neurons and synapses for hardware-level neuromorphic computing. Often, the RS occurs by the formation of low-resistance filaments that percolate between the device electrodes. Because the filaments appear at different locations and follow different paths in different devices, the device-to-device variability could be very large. This presents a serious challenge for building large-scale RS circuits. In this talk, we introduce a novel approach of using focused ion beam irradiation to “guide” the filament formation. We use the RS in vanadium oxides as a case study. We show that both the position and the shape of the filament could be controllably adjusted by a relatively low dose of Ga+ ion irradiation. Our work demonstrates that local irradiation is an efficient tool for fine-tuning the RS properties, which could provide a general solution in solving the device-to-device variability problem.

*Work supported by the Quantum Materials for Energy Efficient Neuromorphic Computing an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award # DE-SC0019273.

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Presenters

  • Nareg Ghazikhanian

    • Materials Science and Engineering, University of California, San Diego
    • Department of Physics, University of California San Diego

Authors

  • Nareg Ghazikhanian

    • Materials Science and Engineering, University of California, San Diego
    • Department of Physics, University of California San Diego

  • Javier del Valle

    • Department of Quantum Matter Physics, University of Geneva
    • University of Geneva
    • Univ of Geneva

  • Pavel Salev

    • Dept. of Physics and Center for Advanced Nanoscience, UCSD, La Jolla, CA, USA
    • Department of Physics, University of California, San Diego
    • University of California, San Diego

  • Yoav Kalcheim

    • Faculty of Materials Science and Engineering, Technion - Israel Institute of Technology
    • Faculty of Materials Science and Engineering, Technion-Israel Institute of Technology
    • Technion - Israel Institute of Technology
    • Technion-Israel Institute of Technology
    • University of California, San Diego

  • Coline Adda

    • Department of Physics, University of California, San Diego

  • Ivan Schuller

    • University of California, San Diego
    • Dept. of Physics and Center for Advanced Nanoscience, UCSD, La Jolla, CA, USA
    • Physics Department, University of California, San Diego
    • Department of Physics, University of California, San Diego