Photo-assisted volatile insulating state in hybrid CdS/Mott heterostructures

ORAL

Abstract

The manipulation of the insulating to metal transition (IMT) of strongly correlated oxides is of major interest due to its potential applications in optoelectronics and neuromorphic computing. We have recently showed that the IMT of VO2, V2O3 and V3O5 can largely be manipulated through the use of photodoping. We discovered recently large effects in heterostructures which incorporate a photoconducting material (CdS) and a strongly correlated Mott oxide. In this work, we have extended it to a heterostructures containing manganites, e.g., La0.3Sr0.7MnO3 (LSMO), whose insulating state resistance drops notably when exposed to light. We will discuss the possible physical origin of this interesting room temperature, volatile effect.

*Work funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award # DE-FG02 87ER-45332

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Publication: - A hybrid optoelectronic Mott insulator. Appl. Phys. Lett. 118, 141901 (2021). (Editor's Pick, and Cover for the April)
- A light-based resistive switching heterostructure for neuromorphic computing: CdS/V3O5. PRA (under review)
- Volatile and Non-volatile insulating state assisted by photoreaction on the hybrid CdS/Nickelates. (in preparation)
- Photo-assisted isostructural metal insulator transition in Rutile VO2. (in preparation)
- Photo-assisted volatile insulating state in hybrid CdS/LSMO heterostructures. (in preparation)

Presenters

  • Henry Navarro

    • University of California, San Diego
    • University of California San Diego

Authors

  • Henry Navarro

    • University of California, San Diego
    • University of California San Diego

  • Erbin Qiu

    • university of carlifornia, San Diego
    • Department of Physics, University of California, San Diego, California 92093, USA
    • University of California San Diego

  • Fernando Ajejas

    • IMDEA Nanociencia, C/Faraday 9, 28049 Madrid, Spain
    • University of California San Diego

  • Coline Adda

    • University of California, San Diego

  • Nicolas M Vargas

    • University of California, San Diego
    • University of California San Diego

  • Victor Rouco

    • Univ Complutense
    • Universidad Complutense Madrid, Spain
    • CNRS/THALES

  • Alberto Rivera

    • Univ Complutense
    • Universidad Complutense Madrid, Spain

  • Jacobo Santamaria

    • Univ Complutense

  • Alex Frano

    • University of California, San Diego

  • Ivan K Schuller

    • University of California, San Diego
    • University of California San Diego