A Nuclear Quadrupole Resonance Spectrum in a Solid-Solution System CaCu<sub>3</sub>Ti<sub>4−</sub><i><sub>x</sub></i>Ru<i><sub>x</sub></i>O<sub>12</sub> Showing a Metal-to-Insulator Transition
Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2019)