Superconductivity in KCa$_2$Fe$_4$As$_4$F$_2$ with Separate Double Fe$_2$As$_2$ Layers
Zhi-Cheng Wang, Chao-Yang He, Si-Qi Wu, Zhang-Tu Tang, Yi Liu,, Abduweli Ablimit, Chun-Mu Feng, Guang-Han Cao
TL;DR
This paper reports the synthesis and characterization of a new iron-arsenide superconductor, KCa₂Fe₄As₄F₂, which exhibits bulk superconductivity at 33 K due to its unique layered structure.
Contribution
It introduces a novel compound with a distinct layered structure containing double Fe₂As₂ layers, expanding the family of iron-based superconductors.
Findings
Bulk superconductivity at 33 K confirmed by measurements.
Unique layered structure with double Fe₂As₂ layers separated by insulating layers.
Crystallizes in a body-centered tetragonal lattice.
Abstract
We report synthesis, crystal structure and physical properties of a quinary iron-arsenide fluoride KCaFeAsF. The new compound crystallizes in a body-centered tetragonal lattice (with space group , = 3.8684(2) {\AA}, c = 31.007(1) {\AA}, and = 2), which contains double FeAs conducting layers separated by insulating CaF layers. Our measurements of electrical resistivity, dc magnetic susceptibility and heat capacity demonstrate bulk superconductivity at 33 K in KCaFeAsF.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.