Ternary telluride ${\mathrm{Ta}}_4{\mathrm{Pd}}_3{\mathrm{Te}}_{16}$ is a layered superconductor with quasi-one-dimensional characteristics. It has attracted great research interests due to the possible nodal superconductivity and its interplay with adjacent charge-density wave as well as proposed nontrivial band topology. Here, we report low-energy electronic band structure of ${\mathrm{Ta}}_4{\mathrm{Pd}}_3{\mathrm{Te}}_{16}$ by means of high-resolution laser-based angle-resolved photoemission spectroscopy. We acquired the Fermi surface and detailed band dispersions, directly reflecting its multiband nature. Furthermore, dispersion kinks at ∼8 meV below the Fermi level are unambiguously observed, indicative of strong electron-boson coupling. We suggest these kinks are probably due to electron-phonon coupling with effective coupling constants quantified to be ∼0.72 and ∼0.48 for the ${\gamma }_1$ and ${\gamma }_2$ bands, respectively. Our results provide valuable information for future studies on the mechanism of superconductivity as well as its intimacy to charge-density wave in ${\mathrm{Ta}}_4{\mathrm{Pd}}_3{\mathrm{Te}}_{16}$.

中文翻译：

---

低维超导体Ta4Pd3Te16中电子结构和电子-玻色子耦合的观察

三元碲化物 ${塔}_4{钯}_3{特}_{16}$是具有准一维特性的层状超导体。由于可能的节点超导性及其与相邻电荷密度波的相互作用以及提出的非平凡带拓扑，它引起了极大的研究兴趣。在这里，我们报告了低能电子能带结构${塔}_4{钯}_3{特}_{16}$通过基于高分辨率激光的角分辨光发射光谱。我们获得了费米表面和详细的波段色散，直接反映了它的多波段性质。此外，在费米能级以下~8 meV 处的色散扭结被明确观察到，表明电子 - 玻色子耦合很强。我们认为这些扭结可能是由于电子-声子耦合，其有效耦合常数量化为~0.72 和~0.48。${\gamma }_1$ 和 ${\gamma }_2$乐队，分别。我们的研究结果为未来研究超导机制及其与电荷密度波的密切关系提供了有价值的信息。${塔}_4{钯}_3{特}_{16}$.