Dynamics of charge-density waves in electron-irradiatedK0.3MoO3

A systematic study is carried out on ${\mathrm{K}}_{0.3}$ ${\mathrm{MoO}}_3$ crystals irradiated with 2.5-MeV electrons. The high-temperature charge-density-wave (CDW) threshold field ${\mathit{E}}_{\mathit{T}}$ and the static dielectric constant ε(ω→0) are measured in the temperature range 40T${\mathit{E}}_{\mathit{T}}^{\mathrm{*}}$ and the dielectric constant ${\mathrm{\epsilon }}^{\mathrm{*}}$ at liquid-helium temperature (4.2 K) are also measured, all as functions of increasing irradiation dosage. Empirical relations among these quantities, which characterize the dynamics of charge-density waves in both the high-temperature and the low-temperature regimes, are established. Our experimental results are then compared with current theoretical models.