Collective excitation of a short-range charge ordering in $\theta$-$\mbox{(BEDT-TTF)}_2\mbox{CsZn(SCN)}_4$

K. Hashimoto, S. C. Zhan, R. Kobayashi +5

We find a characteristic low-energy peak structure located in the range of 100-300 cm${}^{-1}$ in the optical conductivity spectra of a quasi-two-dimensional organic compound with a…