Superconductivity in Fe1.05Te:Ox single crystals
Z. T. Zhang, Z. R. Yang, W. J. Lu, X. L. Chen, L. Li, Y. P. Sun, C. Y. Xi, L. S. Ling, C. J. Zhang, L. Pi, M. L. Tian, Y. H. Zhang
DOI 10.1103/PhysRevB.88.214511 · 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
We report the discovery of superconductivity at ∼9 K in Fe1.05Te single crystals that have been exposed to air for more than six months. The superconductivity is induced due to the oxygen incorporation and only exists in the surface layer of the samples. Our high-resolution transmission electron microscopy experiments and density functional theory calculations show the oxygen prefers to locate at the interstitial site in the Fe-Te layer. X-ray photoelectron spectra characterize an enhancement of the itinerant character of Fe 3d electrons, which may reduce the local moment and hence suppress the long-range antiferromagnetism associated with superexchange interactions. This work suggests the bicollinear antiferromagnetism in Fe1+yTe can be suppressed by oxygen incorporation to induce superconductivity and thus could be considered as the parent phase of the superconductivity.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Fe1.05Te:Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9 | Pressure not reported | onset |
| Fe1.05Te:Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8 | Pressure not reported | onset |
| Fe1.08Te:Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Fe1.08Te Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Superconductivity at Tc∼14 K in single-crystalline FeTe0.61Se0.39
similarity 0.95T. Taen et al.
Source status unknown — claims are unverified
Protonation-induced discrete superconducting phases in bulk FeSe single crystals
similarity 0.94Yan Meng et al.
Source status unknown — claims are unverified
Superconducting and tetragonal-to-orthorhombic transitions in single crystals of FeSe1−xTex (0≤ x ≤0.61)
similarity 0.94Kotaro Terao et al.
Source status unknown — claims are unverified
Synthesis, crystal structure, and chemical stability of the superconductor FeSe1−x
similarity 0.94E. Pomjakushina et al.
Source status unknown — claims are unverified
Superconductivity, magnetism, and stoichiometry of single crystals of Fe1+y(Te1−xSx)z
similarity 0.94Rongwei Hu et al.
Source status unknown — claims are unverified
Pressure dependence of the electronic structure and spin state in Fe1.01Se superconductors probed by x-ray absorption and x-ray emission spectroscopy
similarity 0.94J. M. Chen et al.
Source status unknown — claims are unverified