Observation of electronic structure and electron-boson coupling in the low-dimensional superconductor Ta4Pd3Te16
H. F. Yang, X. L. Liu, S. M. Nie, W. J. Shi, K. Huang, H. J. Zheng, J. Zhang, Y. W. Li, A. J. Liang, M. X. Wang, L. X. Yang, Y. F. Guo, Z. K. Liu, Y. L. Chen
DOI 10.1103/PhysRevB.104.L220501 · Physical Review B
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Abstract
Ternary telluride Ta4Pd3Te16 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 Ta4Pd3Te16 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 γ1 and γ2 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 Ta4Pd3Te16.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ta4Pd3Te16 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.6 | Pressure not reported | unknown |
| Ta4Pd3Te16 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.7 | 0.0031 GPa | unknown |
| Ta4Pd3Te16 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.8 | Pressure not reported | onset |
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