Magnetic properties of Li2RuO3 as studied by NMR and LDA + DMFT calculations
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- Arapova, I.Y., Buzlukov, A.L., Germov, A.Y. et al. Jetp Lett. (2017) 105: 375. doi:10.1134/S0021364017060017
We present results of the combined study of the magnetic properties of Li2RuO3 by means of nuclear magnetic resonance (NMR) spectroscopy and theoretical dynamical mean-field theory (LDA + DMFT) calculations. The NMR data clearly show the onset of a thermal activation process in the high temperature region, T > 560K, which is tentatively ascribed to the formation of the valence bond liquid. The LDA + DMFT calculations demonstrate that the magnetic response at these temperatures is mostly due to the xz/yz orbitals, while the xy orbitals of Ru still form molecular orbitals. Thus, Ru ions are in the orbital-selective state in the high temperature phase of Li2RuO3.