Superconductivity in Quasi-One-Dimensional K2Cr3As3 with Significant Electron Correlations
Jin-Ke Bao, Ji-Yong Liu, Cong-Wei Ma, Zhi-Hao Meng, Zhang-Tu Tang, Yun-Lei Sun, Hui-Fei Zhai, Hao Jiang, Hua Bai, Chun-Mu Feng, Zhu-An Xu, Guang-Han Cao
DOI 10.1103/PhysRevX.5.011013 · Physical Review X
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We report the discovery of bulk superconductivity (SC) at 6.1 K in a quasi-one-dimensional chromium pnictide K2Cr3As3 that contains [(Cr3As3)2−]∞ double-walled subnanotubes with face-sharing Cr6/2 (As6/2) octahedron linear chains in the inner (outer) wall. The material has a large electronic specific-heat coefficient of 70–75 mJ K−2 mol−1, indicating significantly strong electron correlations. A linear temperature dependence of resistivity in a broad temperature range from 7 to 300 K is observed, which suggests non-Fermi liquid behavior of the material. Unconventional SC is preliminarily manifested by the estimated upper critical field exceeding the Pauli limit by a factor of 3–4. The title compound represents a rare example that possibly unconventional SC emerges in a quasi-1D system with strong electron correlations.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| K2Cr3As3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.1 | Pressure not reported | onset |
| K2Cr3As3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.1 | Pressure not reported | onset |
| K2Cr3As3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.1 | Pressure not reported | onset |
| Li0.9Mo6O17 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
NMR Investigation of the Quasi-One-Dimensional Superconductor K2Cr3As3
similarity 0.95H. Z. Zhi et al.
Source status unknown — claims are unverified
Structural instability and magnetism of superconducting KCr3As3
similarity 0.94Guangzong Xing et al.
Source status unknown — claims are unverified
Superconductivity in quasi-one-dimensional Cs2Cr3As3 with large interchain distance
similarity 0.94Zhang-Tu Tang et al. · 2015 · arXiv:1501.02065
Source status unknown — claims are unverified
Coupling of structure to magnetic and superconducting orders in quasi-one-dimensional K2Cr3As3
similarity 0.93K. M. Taddei et al.
Source status unknown — claims are unverified
Ion-exchange synthesis and superconductivity at 8.6 K of Na2Cr3As3 with quasi-one-dimensional crystal structure
similarity 0.93Qing-Ge Mu et al.
Source status unknown — claims are unverified
Superconductivity and phase separation in electrochemically hydrogenized K1−δCr3As3Hx
similarity 0.93Jin-Jin Xiang et al.
Source status unknown — claims are unverified