Incommensurate two-dimensional checkerboard charge density wave in the low-dimensional superconductor Ta 4 Pd 3 Te 16

• Published in: Physical review research Vol. 2; no. 4
• Main Authors: Shi, Zhenzhong, Kuhn, S. J., Flicker, F., Helm, T., Lee, J., Steinhardt, William, Dissanayake, Sachith, Graf, D., Ruff, J., Fabbris, G., Haskel, D., Haravifard, S.
• Format: Journal Article
• Language: English
• Published: United States American Physical Society 16.12.2020
• Subjects: charge density wave; CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; high pressure; quantum oscillation; superconductivity; synchrotron X-ray diffraction
• ISSN: 2643-1564; 2643-1564
• DOI: 10.1103/PhysRevResearch.2.042042

We report the observation of a two-dimensional (2D) checkerboard charge density wave (CDW) in the low-dimensional superconductor Ta4Pd3 Te16. By determining its CDW properties across the temperature-pressure (T-P) phase diagram and comparing with prototypical CDW materials, we conclude that Ta4Pd3Te16 features (a) an incommensurate CDW with a mixed character of dimensions [quasi-1D (Q1D) considering its needlelike shape along the b axis, Q2D as the CDW has checkerboard wave vectors, and 3D because of CDW projections along all three axes], and (b) one of the weakest CDWs compared to its superconductivity (SC), i.e., enhanced SC with respect to CDW, suggesting an interesting interplay of the two orders.