Effects on the electronic and magnetic transitions by light in CdS/La<sub>0.7</sub>Sr<sub>0.3</sub>MnO<sub>3</sub> heterostructures

ORAL

Abstract

The strongly correlated material, La0.7Sr0.3MnO3 (LSMO) exhibits a metal-to-insulator (MIT) coincidental with a magnetic transition near room temperature. Although the physical properties of LSMO can be manipulated by strain, chemical doping, temperature, or magnetic field, they often require large external stimuli. In order to add additional flexibility and tunability we developed a hybrid optoelectronic heterostructure, that uses photocarrier injection from cadmium sulfide (CdS) to an LSMO layer to change its electrical conductivity. Although LSMO exhibits no significant optical response, our ultra-thin CdS/LSMO heterostructures show an enhanced conductivity, with ~ 37 % resistance drop, at the transition temperature under light stimuli. This enhanced conductivity in response to light is comparable to the effect a 9 T magnetic field in pure LSMO. Surprisingly, the optical and magnetic responses of our heterostructures showed different effects when both stimuli are applied. This shows that incorporation of quantum materials into heterostructure may provide the means to add new functionalities.

*Work funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award # DE-FG02-87ER45332.

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Presenters

  • Henry Navarro

    • University of California San Diego

Authors

  • Henry Navarro

    • University of California San Diego

  • ALI C BASARAN

    • University of California, San Diego

  • Fernando Ajejas

    • Uninversity of Californa, San Diego (UCSD)
    • University of California, San Diego

  • Lorenzo Fratino

    • Laboratoire de Physique Théorique et Modélisation, CNRS UMR 8089, CY Cergy Paris Université, 95302 Cergy-Pontoise Cedex, France
    • Université Paris Saclay

  • Soumen Bag

    • Université Paris Saclay

  • Tianxing D Wang

    • University of California, San Diego

  • Erbin Qiu

    • UCSD
    • University of California San Diego

  • Victor Rouco

    • Universidad Complutense de Madrid

  • Isabel Tenreiro

    • Universidad Complutense de Madrid

  • Felipe Torres

    • Universidad de Chile

  • Alberto Rivera

    • GFMC, Dept. Física de Materiales, Facultad de Física, Universidad Complutense de Madrid, Madrid 28040, Spain.
    • Universidad Complutense de Madrid

  • Jacobo Santamaria

    • GFMC, Dept. Física de Materiales, Facultad de Física, Universidad Complutense de Madrid, Madrid 28040, Spain.
    • Univ Complutense
    • Universidad Complutense de Madrid

  • Marcelo J Rozenberg

    • Laboratoire de Physique des Solides, CNRS - Université Paris Saclay, Orsay 91405, France
    • Université Paris Saclay

  • IVAN K SCHULLER

    • University of California, San Diego
    • Department of Physics, University of California San Diego
    • Department of Physics, University of California, San Diego