Back to Search
Start Over
Observation of Two-dimensional Superconductivity in an Ultrathin Iron-Arsenic Superconductor
- Source :
- 2D Mater. 8 (2021) 025024
- Publication Year :
- 2020
-
Abstract
- Two-dimensional (2D) superconductors supply important platforms for exploring new quantum physics and high-$T_c$ superconductivity. The intrinsic superconducting properties in the 2D iron-arsenic superconductors are still unknown owing to the difficulties in the preparation of ultrathin samples. Here we report the fabrication and physical investigations of the high quality single-crystalline ultrathin films of the iron-arsenic superconductor KCa$_2$Fe$_4$As$_4$F$_2$. For the sample with the thickness of 2.6$\sim$5 nm (1$\sim$2 unit cells), a sharp superconducting transition at around 30 K (onset point) is observed. Compare with the bulk material, the ultrathin sample reveals a relatively lower $T_c$, wider transition width, and broader flux liquid region under the in-plane field. Moreover, the angle dependent upper critical field follows the Tinkham model, demonstrating the two-dimensional superconductivity in ultrathin KCa$_2$Fe$_4$As$_4$F$_2$.<br />Comment: 5 pages, 4 figures
- Subjects :
- Condensed Matter - Superconductivity
Condensed Matter - Materials Science
Subjects
Details
- Database :
- arXiv
- Journal :
- 2D Mater. 8 (2021) 025024
- Publication Type :
- Report
- Accession number :
- edsarx.2006.03338
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1088/2053-1583/abdaba