학술논문
Local Metallic and Structural Properties of the Strongly Correlated Metal LaNiO$_{3}$ using $^{8}$Li $\beta$-NMR
Document Type
Working Paper
Author
Karner, Victoria L.; Chatzichristos, Aris; Cortie, David L.; Dehn, Martin H.; Foyevtsov, Oleksandr; Foyevtsova, Kateryna; Fujimoto, Derek; Kiefl, Robert F.; Levy, C. D. Philip; Li, Ruohong; McFadden, Ryan M. L.; Morris, Gerald D.; Pearson, Matthew R.; Stachura, Monika; Ticknor, John O.; Cristiani, Georg; Logvenov, Gennady; Wrobel, Friedrike; Keimer, Bernhard; Zhang, Junjie; Mitchell, John F.; MacFarlane, W. Andrew
Source
Phys. Rev. B 100, 165109 (2019)
Subject
Language
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.
Comment: 10 pages, 8 figures
Comment: 10 pages, 8 figures