Superconductivity Induced by the Suppression of a Charge-Density-Wave Type Structural Transition in Distorted 1T-TaTe 2 Single Crystals
Abstract
We report the structural, transport, and thermoelectric properties of Ta ( T e 1 − x S e x ) 2 (0 ≤ x ≤ 0.5) single crystals, which show a charge-density-wave (CDW)-like structural transition at T CDW = 180 K for x = 0, that is gradually suppressed for 0 ≤ x ≤ 0.05, as a result of the local Ta–Ta/Ta–Te(Se) bonding instability. Superconductivity (SC) emerges around the critical doping level x = 0.05, indicating that there is competition between SC and CDW. The onset of T C is enhanced for x = 0.1, however, the ratio of its T C to the Fermi temperature T F is small, corresponding to weak electronic correlations. With increasing x, the monoclinic structural distortion disappears for x ≥ 0.25. These results not only demonstrate the interplay between competing electronic orders but also provide fundamental insights into the complex electron-lattice-bond coupled phenomena in TaTe 2 .
Fields of Study & Subjects
Organic and Molecular Conductors Research
2D Materials and Applications
Iron-based superconductors research
Publication details
- Journal / source
- The Journal of Physical Chemistry C
- Publisher
- American Chemical Society (ACS)
- Volume
- 130
- Issue
- 3
- Pages
- 1379–1384
- Publication date
- 9 January 2026
- Language
- EN