Local Metallic and Structural Properties of the Strongly Correlated Metal LaNiO${}_3$ using ${}^8$Li $\beta$-NMR

Abstract

We report $\beta$-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.

arXiv comment10 pages, 8 figures

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Cited by in corpus (6)

• Review on quasi-2D square planar nickelates
• Observation of an antiferromagnetic quantum critical point in high-purity LaNiO${}_3$
• Assessing the correlated electronic structure of lanthanum nickelates
• Depth-resolved measurement of the Meissner screening profile in a niobium thin film from spin-lattice relaxation of the implanted $\beta$-emitter ${}^8$Li
• Evolution of the metallic state of LaNiO${}_3$/LaAlO${}_3$ superlattices measured by ${}^8$Li $\beta$-detected NMR
• Probing electronic and magnetic transitions of short periodic nickelate superlattices using synchrotron x-ray