Ground States of Infinite-Layer Nickelates at Strong Coupling: A Variational Study

ORAL

Abstract

Motivated by the recent discovery of superconductivity in infinite-layer nickelates, we study a two orbital model, including both nickel 3d and the rare-earth 5d orbitals, in the regime of strong local repulsive interactions. Using variational Monte-Carlo calculations which treat strong correlations via suitable projection techniques, we investigate superconductivity and study its dependence on the hole and electron doping, three-dimensionality, and the energetics of the rare-earth 5d orbital. We report a ground state phase diagram of this system, and provide complementary insights using a parton mean-field theory.

*VBS and DC thank the visitor program at MPIPKS, Dresden, where part of this work was carried out.

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Presenters

  • Amal Medhi

    • Indian Institute of Science Education and Research Thiruvananthapuram

Authors

  • Amal Medhi

    • Indian Institute of Science Education and Research Thiruvananthapuram

  • Chuan Chen

    • MPIPKS, Dresden
    • Natl Univ of Singapore

  • Vijay Shenoy

    • Indian Institute of Science
    • Indian Institute of Science, Bangalore

  • Debanjan Chowdhury

    • Cornell University, Ithaca
    • Physics, Cornell University
    • Department of Physics, Cornell University