Evolution of the metallic state in LaNiO3/LaAlO3 superlattices measured by Li8β -detected NMR
| Autor: | Bernhard Keimer, Georg Cristiani, Gennady Logvenov, W. Andrew MacFarlane, Gerald D. Morris, Victoria L. Karner, Aris Chatzichristos, Ryan M. L. McFadden, Derek Fujimoto, Ruohong Li, C. D. Philip Levy, Eva Benckiser, Robert F. Kiefl, Matthew Pearson, David L Cortie, Alexander Boris |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Condensed matter physics Field (physics) biology Superlattice Bilayer Relaxation (NMR) 02 engineering and technology 021001 nanoscience & nanotechnology biology.organism_classification 01 natural sciences Metal Amplitude visual_art 0103 physical sciences Bipartite graph visual_art.visual_art_medium Lanio 010306 general physics 0210 nano-technology |
| Zdroj: | Physical Review B. 104 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.104.205114 |
| Popis: | Using ion-implanted $^{8}\mathrm{Li} \ensuremath{\beta}$-detected NMR, we study the evolution of the correlated metallic state of ${\mathrm{LaNiO}}_{3}$ in a series of ${\mathrm{LaNiO}}_{3}/{\mathrm{LaAlO}}_{3}$ superlattices as a function of bilayer thickness. Spin-lattice relaxation measurements in an applied field of $6.55\phantom{\rule{0.16em}{0ex}}\mathrm{T}$ reveal two equal amplitude components: one with metallic ($T$ linear) $1/{T}_{1}$ and a second with a more complex $T$ dependence. The metallic character of the slow relaxing component is only weakly affected by the ${\mathrm{LaNiO}}_{3}$ thickness, while the fast component is much more sensitive, exhibiting the opposite temperature dependence (increasing toward low $T$) in the thinnest, most magnetic samples. The origin of this bipartite relaxation is discussed in terms of electronic phase separation. |
| Databáze: | OpenAIRE |
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