Antiferromagnetic correlations in the metallic strongly correlated transition metal oxide LaNiO3

• DOI: 10.1038/s41467-017-02524-x
• Publication Date: 2017-12-28T15:36:54Z
• Authors: H. Guo; Z. W. Li; L. Zhao; Z. Hu; C. F. Chang; C.-Y. Kuo; W. Schmidt; A. Piovano; T. W. Pi; O. Sobolev; D. I. Khomskii; L. H. Tjeng; A. C. Komarek
• Keywords: Condensed Matter - Strongly Correlated Electrons; Strongly Correlated Electrons (cond-mat.str-el); Science; Q; 0103 physical sciences; FOS: Physical sciences; 01 natural sciences; Article; info:eu-repo/classification/ddc/500

The material class of rare earth nickelates with high Ni$^{3+}$ oxidation state is generating continued interest due to the occurrence a metal-insulator transition charge order and appearance non-collinear magnetic phases within this insulating regime. recent theoretical prediction for superconductivity in LaNiO$_3$ thin films has also triggered intensive research efforts. seems be only nickelate that stays metallic paramagnetic down lowest temperatures. So far, centimetre-sized impurity-free single crystal growth not been reported since elevated oxygen pressures are required their synthesis. Here, we report on successful crystals by floating zone technique at up 150 bar. Our essentially free from Ni$^{2+}$ impurities exhibit properties together an unexpected but clear antiferromagnetic transition.