Berlin 2018 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 34: Focus Session: Frontiers of Electronic-Structure Theory: Correlated Electron Materials VII (joint session O/TT/MM/DS/CPP)
DS 34.4: Vortrag
Donnerstag, 15. März 2018, 16:00–16:15, HL 001
Antiferromagnetic correlations in the metallic strongly correlated transition metal oxide LaNiO3 — •Hanjie Guo1, Zhiwei Li1, Li Zhao1, Zhiwei Hu1, Chunfu Chang1, Changyang Kuo1, Wolfgang Schmidt2, Andrea Piovano2, Tunwen Pi3, Oleg Sobolev4, Daniel Khomskii1, Liu Hao Tjeng1, and Alexander Komarek1 — 1MPI CPfS, Dresden, Germany — 2ILL, Grenoble, France — 3NSRRC, Taiwan — 4FRMII, Munich, Germany
The material class of rare earth nickelates with high Ni3+ oxidation state is generating continued interest due to the occurrence of a metal-insulator transition with charge order and the appearance of non-collinear magnetic phases within this insulating regime. The recent theoretical prediction for superconductivity in LaNiO3 thin films has also triggered intensive research efforts. LaNiO3 seems to be the only rare earth nickelate that stays metallic and paramagnetic down to lowest temperatures. So far, centimetre-sized impurity-free single crystal growth has not been reported for the rare earth nickelates material class since elevated oxygen pressures are required for their synthesis. Here, we report on the successful growth of centimetre-sized LaNiO3 single crystals by the floating zone technique at oxygen pressures of up to 150 bar. Our crystals are essentially free from Ni2+ impurities and exhibit metallic properties together with an unexpected but clear antiferromagnetic transition.