Signature of Tomonaga-Luttinger liquid with attractive interaction and 1D localization in Ta₂Ni₃Te₅

At low dimensions, electronic correlations often leads a to distinct properties when compared to three-dimensional systems. Particularly, the Tomonaga-Luttinger liquid (TLL), a one-dimensional conductor with Coulomb interaction, is predicted to exhibit unique behavior(s), including bosonization, charge-spin separation, and power-law behavior for the correlation functions. Unsing microfabrication techniques to one-dimensional systems, signatures for the TLL phase has been exposed for various systems including carbon nanotubes, quantum spin Hall insulators, topological hinge states, and moiré lattices, via power law relations. However, all these observations are limited to systems characterized by repulsive Coulomb interactions. Here, we present evidence for a TLL phase characterized by attractive interactions as well as 1D localization in the quasi-one-dimensional system Ta₂Ni₃Te₅. We tested the power-law behavior of the differential conductivity within the metallic regime observed along the b axis, and obtained a universal rescaled dI/dV curves as a function of (eV/k_BT)^a. The sign of a is found to be negative, which is a signature for a TLL phase with attractive interactions. This presentation will discuss structural and electrical properties of Ta₂Ni₃Te₅, focusing on the nonlinear I-V curves and related phases such as the TLL phase and 1D localization states.