title: Raman scattering investigation of the quasi-one-dimensional superconductor Ta₄Pd₃Te₁₆.
abstract: We have performed polarized Raman scattering measurements on the newly discovered superconductor Ta4Pd3Te16 (T(c) = 4.6 K). We observe 28 out of 33 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.
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China.
authors.forename: D
authors.initials: D
authors.lastname: Chen
authors.forename: P
authors.initials: P
authors.lastname: Richard
authors.forename: Z-D
authors.initials: ZD
authors.lastname: Song
authors.forename: W-L
authors.initials: WL
authors.lastname: Zhang
authors.forename: S-F
authors.initials: SF
authors.lastname: Wu
authors.forename: W H
authors.initials: WH
authors.lastname: Jiao
authors.forename: Z
authors.initials: Z
authors.lastname: Fang
authors.forename: G-H
authors.initials: GH
authors.lastname: Cao
authors.forename: H
authors.initials: H
authors.lastname: Ding