Figure 4.

Collective volume plasmons in manganite ${\mathrm{La}}_{0.7}{\mathrm{Ca}}_{0.3}{\mathrm{MnO}}_3$ with nanoscale phase separation; computer simulation of infrared electric field $I={\left|E(x,y)/E_0\right|}^2$ at volume concentration $p=0.28>p_c$ of conducting phase; local permittivity $\epsilon (\mathit{r})$ is positive in the dielectric phase $\mathrm{Re}[\epsilon (\mathit{r})]>0$ and it is negative in conducting phase $\mathrm{Re}[\epsilon (\mathit{r})]<0$, reprinted figure with permission from [81]; Copyright 2006 by the American Physical Society.