Raman scattering investigation of quasi-one-dimensional superconductor Ta${}_4$Pd${}_3$Te${}_{16}$

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.

arXiv comment6 pages, 4 figures, 1 table

References in corpus (6)

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• Superconductivity in a Layered Ta4Pd3Te16 with PdTe2 Chains
• Anisotropic Superconducting Gap and Elongated Vortices with Caroli-De-Gennes-Matricon States in the New Superconductor Ta4Pd3Te16
• Nodal superconductivity and superconducting dome in new layered superconductor Ta4Pd3Te16
• Multiband Te $p$ Based Superconductivity of Ta${}_4$Pd${}_3$Te${}_{16}$

Cited by in corpus (3)

• Thermodynamic Anomaly Above the Superconducting Critical Temperature in the Quasi One-Dimensional Superconductor Ta${}_4$Pd${}_3$Te${}_{16}$
• Incommensurate two-dimensional checkerboard charge density wave in the low dimensional superconductor Ta4Pd3Te16
• Pressure induced change in the electronic state of Ta${}_4$Pd${}_3$Te${}_{16}$