Superconductivity at 55 K in La0.7Sr1.3Cu(O,F)4+δ with reduced CuO2 sheets and apical anions
Xiaolong Chen, Jingkui Liang, Weihua Tang, Cong Wang, Guanghui Rao
DOI 10.1103/PhysRevB.52.16233 · Physical Review B
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
Superconducting copper fluoride La0.7Sr1.3Cu(O,F)4+δ with Tc=55 K had been synthesized via the solid phase fluorination of La0.7Sr1.3CuO3.25 with CuF2 at relatively low temperature. The fluoride is a derivative of its precursor, but its lattice constant a is expanded from 3.7547(5) to 3.9368(7) Å, while its lattice parameter c is expanded from 12.896(3) to 13.075(4) Å. The obvious difference in lattice parameters and crystal structure seems to distinguish this compound from the superconducting Sr2CuO2F4+δ reported in a recent study. It gives strong evidence for superconductivity with reduced CuO2 sheets while in the presence of apical oxygen or fluorine.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La0.7Sr1.3Cu(O,F)4+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 55 | Pressure unresolved | onset |
Similar papers
Electronic properties of La2−xSrxCuO4 high-Tc superconductors
similarity 0.94B. Batlogg et al.
Source status unknown — claims are unverified
Superconductivity in bulk and thin films of La1.85Sr0.15CuO4−δ and Ba2YCu3O7−δ
similarity 0.94K. Moorjani et al.
Source status unknown — claims are unverified
Suppression of superconductivity by the localization of hole carriers in Ti-doped La1.85Sr0.15CuO4
similarity 0.94Caixia Wang et al.
Source status unknown — claims are unverified
Temperature dependence of La spin-lattice relaxation time in the high-Tc superconductor La1.85Sr0.15CuO4
similarity 0.93P. Butaud et al.
Source status unknown — claims are unverified
Enhanced superconductivity in metallic oxides near the metal-insulator transition
similarity 0.93M. S. Osofsky et al.
Source status unknown — claims are unverified
Correlation of dopant-induced optical transitions with superconductivity in La2−xSrxCuO4−δ
similarity 0.93S. Etemad et al.
Source status unknown — claims are unverified