Charge-density-wave dynamics in TaS3

Abstract

We report the observation of strongly frequency ($\omega$)-dependent conductivity ($\sigma$) in the charge-density-wave state of orthorhombic Ta${\mathrm{S}}_3$. Both $\sigma \left(\omega \right)$ and the field-dependent conductivity $\sigma \mathrm{}\left(E\right)\mathrm{}$ are analyzed in terms of Bardeen's tunneling model. Experiments involving the joint application of ac and dc fields are also reported.