TaTe4 is a quasi-1D tetrachalcogenide that exhibits a CDW instability caused by a periodic lattice distortion. Recently, pressure-induced superconductivity has been achieved in this compound, revealing a competition between these different ground states and making TaTe4 very interesting for fundamental studies. Although TaTe4 exhibits CDW ordering below 475 K, transport experiments have reported metallic behavior with a resistivity plateau at temperatures lower than 10 K. In this paper, we study the electronic structure of TaTe4 using a combination of high-resolution angle-resolved photoemission spectroscopy and density functional calculations. Our results reveal the existence of the long-sought metallic states. These states exhibit mixed dimensionality, while some of them might have potential topological properties.
@article{arxiv.2305.00053,
title = {Experimental observation of metallic states with different dimensionality in a quasi-1D charge density wave compound},
author = {P. Rezende-Gonçalves and M. Thees and J. Rojas Castillo and D. Silvera-Vega and R. L. Bouwmeester and E. David and A. Antezak and A. J. Thakur and F. Fortuna and P. Le Fèvre and M. Rosmus and N. Olszowska and R. Magalhães-Paniago and A. C. Garcia-Castro and P. Giraldo-Gallo and E. Frantzeskakis and A. F. Santander-Syro},
journal= {arXiv preprint arXiv:2305.00053},
year = {2023}
}