28 August 2022 to 2 September 2022
Science and Technology Campus, University of Parma
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Studying the evolution of the metallic state in LaNiO$_3$ from a single crystal to superlattices with $\beta$-detected NMR

O-5
29 Aug 2022, 12:20
20m
Science and Technology Campus, University of Parma

Science and Technology Campus, University of Parma

University of Parma, Italy
Oral Strongly correlated electron systems Oral contributions

Speaker

Prof. W. Andrew MacFarlane (UBC)

Description

The rare-earth nickelates (RNiO$_3$) are a prototypical example of a metal-insulator transition. Among the RNiO$_3$, LaNiO$_3$ is unique in remaining metallic, although highly correlated. Interestingly, superlattices with insulating interlayers of LaAlO$_3$, can be driven insulating and antiferromagnetic if they are thin enough$^{1}$. We have used $^8$Li $\beta$-detected NMR ($\beta$-NMR), to study LaNiO$_3$ as a single crystal, thin film, and in superlattices with LaAlO$_3$. We observe biexponential spin-lattice relaxation which we attribute to electronic phase separation$^{2,3}$. In the single crystal and bulk-like thin film, both phases appear metallic$^{2}$. However, in the ultrathin layers of the superlattices, the behaviour of one of the phases appears magnetic at low temperature$^{3}$.
1. A. V. Boris et al., Science 332, 937 (2011)
2. V. L. Karner et al., Phys. Rev. B 100, 165109 (2019)
3. V. L. Karner et al., Phys. Rev. B. 104, 205114 (2021)

Primary authors

Victoria Karner (TRIUMF) Dr Eva Benckiser (Max Planck Institute for Solid State Research) Dr Alexander V. Boris (Max Planck Institute for Solid State Research) Dr Aris C. Chatzichristos (UBC) Dr Georg Cristiani (Max Planck Institute for Solid State Research) Dr David L. Cortie (University of Wollongong) Martin Dehn Dr Oleksandr Foyevstov (Stewart Blusson Quantum Matter Institute) Dr Kateryna Foyevstove (Stewart Blusson Quantum Matter Institute) Derek Fujimoto (University of British Columbia) Rob Kiefl (University of British Columbia) Dr Keimer Bernhard (Max Planck Institute for Solid State Research) Dr C.D.P. Levy (TRIUMF) Dr Ruohong Li (Triumf ) Dr Logvenov Gennady (Max Planck Institute for Solid State Research) Mr Ryan M. L. McFadden (UBC) Dr John F. Mitchell (Argonne National Laboratory) Dr Gerald D. Morris (TRIUMF) Dr M.R. Pearson (TRIUMF) Dr Monika Stachura (TRIUMF) John Ticknor (University of British Columbia) Dr F. Wrobel Dr Junjie Zhang (Argonne National Laboratory) Prof. W. Andrew MacFarlane (UBC)

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