Anomalous temperature dependence of polaron mobility in a nonlinear double-well potential: unbiased X-propagator approach

Stefano Ragni, Osor S. Barišić, Naoto Nagaosa +1

We develop an unbiased X-propagator method for calculating finite-temperature optical conductivity $\sigma (\omega )$ and dc mobility $\mu$ for arbitrary nonlinear electron-phonon interaction. W…