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arXiv · 1906.07878

Local Metallic and Structural Properties of the Strongly Correlated Metal LaNiO$_{3}$ using $^{8}$Li $β$-NMR

Victoria L. Karner·Aris Chatzichristos·David L. Cortie·Martin H. Dehn·Oleksandr Foyevtsov·Kateryna Foyevtsova·Derek Fujimoto·Robert F. Kiefl·C. D. Philip Levy·Ruohong Li·Ryan M. L. McFadden·Gerald D. Morris·Matthew R. Pearson·Monika Stachura·John O. Ticknor·Georg Cristiani·Gennady Logvenov·Friedrike Wrobel·Bernhard Keimer·Junjie Zhang·John F. Mitchell·W. Andrew MacFarlane
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Abstract

We report $β$-detected NMR of ion-implanted $^{8}$Li in a single crystal and thin film of the strongly correlated metal LaNiO$_{3}$. In both samples, spin-lattice relaxation measurements reveal two distinct local metallic environments, as is evident from $T$-linear Korringa $1/T_{1}$ below 200 K with slopes comparable to other metals. A small, approximately temperature independent Knight shift of $\sim 74$ ppm is observed, yielding a normalized Korringa product characteristic of substantial antiferromagnetic correlations, but, we find no evidence for a magnetic transition from 4 to 310 K. Two distinct, equally abundant $^{8}$Li sites is inconsistent with the widely accepted rhombohedral structure of LaNiO$_{3}$, but cannot be simply explained by either of the common alternative orthorhombic or monoclinic distortions.

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Victoria L. Karner, Aris Chatzichristos, David L. Cortie, Martin H. Dehn, Oleksandr Foyevtsov, Kateryna Foyevtsova, Derek Fujimoto, Robert F. Kiefl, C. D. Philip Levy, Ruohong Li, Ryan M. L. McFadden, Gerald D. Morris, Matthew R. Pearson, Monika Stachura, John O. Ticknor, Georg Cristiani, Gennady Logvenov, Friedrike Wrobel, Bernhard Keimer, Junjie Zhang, John F. Mitchell, W. Andrew MacFarlane. 2019-06-19. Local Metallic and Structural Properties of the Strongly Correlated Metal LaNiO$_{3}$ using $^{8}$Li $β$-NMR. https://doi.org/10.1103/physrevb.100.165109

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