Incommensurate two-dimensional checkerboard charge density wave in the low-dimensional superconductor <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Ta</mml:mi><mml:mn>4</mml:mn></mml:msub><mml:msub><mml:mi>Pd</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi>Te</mml:mi><mml:mn>16</mml:mn></mml:msub></mml:mrow></mml:math>
Zhenzhong Shi, Stephen J. Kuhn, Felix Flicker, Toni Helm, Jooseop Lee, William Steinhardt, Sachith Dissanayake, David Graf, Jacob Ruff, G. Fabbris, D. Haskel, Sara Haravifard
Abstract
We report the observation of a two-dimensional (2D) checkerboard charge density wave (CDW) in the lowdimensional superconductor Ta 4 Pd 3 Te 16 . By determining its CDW properties across the temperature-pressure (T -P) phase diagram and comparing with prototypical CDW materials, we conclude that Ta 4 Pd 3 Te 16 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.