Effect of Charge Density Wave on Reflectance Spectra of TaS_3 and NbSe_3(EXPERIMENTS ON MX_3 COMPOUNDS, International Symposium on NONLINEAR TRANSPORT AND RELATED PHENOMENA IN INORGANIC QUASI ONE DIMENSIONAL CONDUCTORS)

Abstract

We report the new reflectance results in the plasmon region of orthorohmbic TaS_3 (single crystal) as a function of temperature through the Peierls transition and in the near plasmon region of monoclinic NbSe_3, and the reflectivity at 1.96eV of both as a function of temperature. By the optical spectra we obtain the basic quantities for carriers and lattices. Further, we discuss the modification of one electron excitations and plasmon collective excitations through the new periodicity in crystals.