Raman spectra of inorganic solidstantalum compounds/ metal-insulating phase transitionRaman scattering(TaSe 4) 2Iquasi-one dimensional CDW compound/ A7130 Metal-insulator transitions and other electronic transitions A7830G Infrared and Raman spectra in inorganic crystals...
Interpretation of Photoemission Spectra of (TaSe4)2I as Evidence of Charge Density Wave FluctuationspiperidineRaman scattering spectroscopysilverThe competition between different and unusual effects in quasi-one-dimensional conductors makes the direct interpretation of experimental measurements of these materials...
Polarized Raman spectra were obtained in the quasi-one-dimensional conductor (TaSe 4) 2I above and below the charge-density-wave (CDW) transition temperature ( T c=263 K). The Raman intensities of many peaks become intenser and two of the phonon peaks shift to higher frequency with ...
The rapid rise in the Raman efficiency of these lines is attributed to changes in the first order susceptibility induced by changes in the electronic band structure at the onset of the CDW. The unusual hardening with temperature of the band at about 90 cm 1, formely assigned to the amplitude...
For (TaSe 4) 2I, a 'spoon-like' anomaly of the dispersion curve of the TA phonon branch was observed around the superlattice point. This result is in direct support of the TA mode condensation at the CDW transition, which was predicted based on X-ray studies and the Raman scattering ...
For (TaSe 4 ) 2 I, a 'spoon-like' anomaly of the dispersion curve of the TA phonon branch was observed around the superlattice point. This result is in direct support of the TA mode condensation at the CDW transition, which was predicted based on X-ray studies and the Raman scattering...
The present Raman study in quasi-one-dimensional CDW system, (TaSe 4 ) 2 I and (NbSe 4 ) 2 I, elucidates the existence of three CDW-related TO modes: the amplitude mode from the Kohn anomaly point and two TO modes coupled with it. The CDW transition in this system is theoretically ...