Tuning a coupled phase transition in nickelate thin films using helium ion implantation

ORAL

Abstract

Coupling of lattice, charge and spin degrees of freedom in strongly correlated electron systems of rare earth nickelates leads to the concurrent first order phase transition from a paramagnetic metal to a bond-ordered antiferromagnetic insulator in NdNiO3 and PrNiO3. Identification of the driving electronic degree of freedom of this phase transition is still debated. Here we will show how increasing helium ion implantation to epitaxially grown films can act as a tuning knob to gradually suppress the phase transition. Then we will follow up with experimental results detailing the effect of helium ion implantation on individual electronic degrees of freedom. We will conclude our discussion with important insights on the coupled first order phase transition.

*This collaborative work was supported as part of the "Quantum Materials for Energy Efficient Neuromorphic Computing" (Q-MEEN-C), an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences under the Award No. DESC0019273.

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Presenters

  • Rourav Basak

    • University of California, San Diego

Authors

  • Rourav Basak

    • University of California, San Diego

  • Sarmistha Das

    • University of California San Diego

  • Uday S Goteti

    • University of California, San Diego

  • Brandon Gunn

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

  • Joshua Evans

    • University of California San Diego

  • Nirjhar Sarkar

    • University of California San Diego

  • Padraic Shafer

    • Lawrence Berkeley National Laboratory
    • Advanced Light Source

  • Christoph Klewe

    • Lawrence Berkeley National Laboratory
    • Advanced Light Source

  • John W Freeland

    • Argonne National Laboratory

  • Fanny M Rodolakis

    • Argonne National Laboratory

  • Shane A Cybart

    • University of California, Riverside

  • Robert C Dynes

    • University of California, San Diego

  • Alex Frano

    • UC San Diego
    • University of California, San Diego