Dynamic Jahn-Teller effect on the nonequilibrium electronic transport in charge-density-wave systems

Despite the well-known Peierls mechanism of the spontaneous symmetry-broken state of charge-density-wave (CDW) in (quasi-) one-dimensional solids, experimental verifications of the CDW have been quite elusive. One of the long-standing controversies has been the initial suppression of the current at a small but finite electric field of a few V/cm, whose energy scale has been many orders of magnitude smaller than the usual Landau-Zener interpretations. In this theoretical work, we investigate the dynamic effect of the Jahn-Teller (JT) phonons coupling of the left- and right-moving electrons and study how the initial suppression at a small electric field is related to the effectiveness of the JT effect in the large electric field limit. We compute the steady-state IV using the Keldysh Green's function method with the JT coupling effect in a conserving approximation with the nonequilibrium hot JT phonons dissipated into an Ohmic bath of background phonons.