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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.

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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