Thermodynamic Anomaly Above the Superconducting Critical Temperature in the Quasi One-Dimensional Superconductor Ta${}_4$Pd${}_3$Te${}_{16}$

Abstract

We study the intrinsic transport anisotropy and fermiology of the quasi one-dimensional superconductor Ta${}_4$Pd${}_3$Te${}_{16}$. Below $T^{\ast }=20$ K we detect a thermodynamic phase transition that predominantly affects the conductivity perpendicular to the quasi one-dimensional chains, consistent with a thermodynamic transition related to the presence of charge order that precedes superconductivity. Remarkably the Fermi surface pockets detected by de Haas-van Alphen (dHvA) oscillations are unaffected by this transition, suggesting that the ordered state does not break any translational symmetries but rather alters the scattering of the quasiparticles themselves.

arXiv comment8 pages, 5 figures

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• Pressure-induced superconductivity in quasi-one-dimensional semimetal ${\mathrm{Ta}}_2{\mathrm{PdSe}}_6$
• Incommensurate two-dimensional checkerboard charge density wave in the low dimensional superconductor Ta4Pd3Te16
• Spectral signatures of a unique charge density wave in Ta${}_2$NiSe${}_7$
• Pressure induced change in the electronic state of Ta${}_4$Pd${}_3$Te${}_{16}$