Effects of the rhombohedral distortion in LaAlO3 on the quadrupolar splitting of the implanted Li-8(+) NMR

V. L. Karner, A. Chatzichristos, D. Fujimoto, R. F. Kiefl, D. P. Levy,R. Li, R. M. L. McFadden, G. D. Morris, M. R. Pearson, J. O. Ticknor,W. A. MacFarlane

15TH INTERNATIONAL CONFERENCE ON MUON SPIN ROTATION, RELAXATION AND RESONANCE（2023）

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摘要

We report the beta-detected NMR of implanted Li-8(+) in the rhombohedrally distorted perovskite LaAlO3. As observed in other insulating perovskites, the resonance has large quadrupolar splitting. However, it exhibits additional splitting due to the rhombohedral distortion. In addition, the magnitude of the electric field gradient at the Li-8 site is larger than in cubic perovskites, such as SrTiO3, with nu(Q) approximate to 191.3 kHz.

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