Electronic and ionic conductivities in superionic Li${}_4$C${}_{60}$

D. Quintavalle, B. G. Márkus, A. Jánossy +7

The $10$ GHz microwave conductivity, $\sigma (T)$ and high field, $222$ GHz electron spin resonance (HF-ESR) of Li${}_4$C${}_{60}$ fulleride is measured in a wide temperature range. We sugge…