1. Raman scattering investigation of quasi-one-dimensional superconductor Ta$_{4}$Pd$_{3}$Te$_{16}$
- Author
-
Song Zd, Guanghan Cao, Dongliang Chen, S. F. Wu, Pierre Richard, W.-L. Zhang, Hong Ding, Zhi-Peng Fang, and Wen-He Jiao
- Subjects
Superconductivity ,Coupling ,Range (particle radiation) ,Materials science ,Condensed matter physics ,Strongly Correlated Electrons (cond-mat.str-el) ,Phonon ,Condensed Matter - Superconductivity ,FOS: Physical sciences ,Condensed Matter Physics ,Superconductivity (cond-mat.supr-con) ,symbols.namesake ,Laser linewidth ,Condensed Matter - Strongly Correlated Electrons ,Condensed Matter::Superconductivity ,symbols ,General Materials Science ,Quasi one dimensional ,Raman spectroscopy ,Raman scattering - Abstract
We have performed polarized Raman scattering measurements on the newly discovered superconductor Ta$_{4}$Pd$_{3}$Te$_{16}$ ($T_c = 4.6$ K). We observe twenty-eight out of thirty-three Raman active modes, with frequencies in good accordance with first-principles calculations. Although most of the phonons observed vary only slightly with temperature and do not exhibit any asymmetric profile that would suggest strong electron-phonon coupling, the linewidth of the A$_{g}$ phonon mode at 89.9 cm$^{-1}$ shows an unconventional increase with temperature decreasing, which is possibly due to a charge-density-wave transition or the emergence of charge-density-wave fluctuations below a temperature estimated to fall in the 140-200 K range., Comment: 6 pages, 4 figures, 1 table
- Published
- 2015
- Full Text
- View/download PDF