On the mysterious magnetic susceptibility of LaNiO3

ORAL

Abstract

Ever since Mott's time, understanding of the enhanced Pauli susceptibility observed in many metallic compounds has remained a great challenge[1]. This, in particular, holds in regard to the temperature dependence of the magnetic susceptibility of LaNiO3, which, up until recently, was thought to be greatly enhanced yet almost temperature independent. However, recent advances in growth of highly stoichiometric LaNiO3 single crystals have revealed that the magnetic susceptibility of LaNiO3 has in fact a much more complex temperature dependence[2,3], which has invoked a renewed theoretical interest in the basic electronic structure of this material. In this talk, we propose an explanation of the recent data assuming temperature dependent disproportionation of localized magnetic moments.

1. N.F. Mott, Metal-insulator transitions 2nd ed., Taylor & Francis, 1990, ISBN:0850667836, p.102-103, 132-143
2. J. Zhang et.al., Cryst. Growth Des. 2017, 17, 2730-2735
3. H. Guo et.al., Nature communications, (2018) 9:43

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Presenters

  • Oleksandr Foyevtsov

    Physics, University of British Columbia

Authors

  • Oleksandr Foyevtsov

    Physics, University of British Columbia

  • John Mitchell

    Materials Science Division, Argonne National Laboratory, Argonne National Lab, Argonne National Laboratory, Material Science Division, Argonne National Lab

  • George Albert Sawatzky

    University of British Columbia, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4, Stewart Blusson Quantum Matter Institute, Physics, University of British Columbia, Stewart Blusson Quantum Matter Institute