Effect of Mn impurities on the superconductivity in NaxCoO2∙yH2O
Y.-J. Chen, C.-J. Liu, J.-S. Wang, J.-Y. Lin, C. P. Sun, S. W. Huang, J. M. Lee, J. M. Chen, J. F. Lee, D. G. Liu, H. D. Yang
DOI 10.1103/PhysRevB.76.092501 · 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
To shed light on the symmetry of the superconducting order parameter in NaxCoO2∙yH2O, the Mn doping effects are studied. X-ray absorption spectroscopy verifies that the doped Mn impurities occupy the Co sites and are with a valance close to +4. Impurity scattering by Mn is in the unitary limit that, however, does not lead to strong Tc suppression. This absence of the strong impurity effects on Tc is inconsistent with the simple picture of a sign-changing order parameter. Coexistence of the s-wave superconducting order parameter and the nodal one is proposed to reconcile all the existing experiments and has been implied by the specific heat experiments.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| NaxCoO2*yH2O Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.5 | Pressure not reported | onset |
| NaxCoO2*yH2O Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.5 | Pressure not reported | onset |
| NaxCo1-zMnzO2*yH2O Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | onset |
| NaxCo0.995Mn0.005O2*yH2O Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.5 | Pressure not reported | onset |
| YBa2(Cu1-zZnz)3O6.93 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 92 | Pressure not reported | unknown |
Similar papers
Anomalous impurity effects in the iron-based superconductor KFe2As2
similarity 0.95A. F. Wang et al.
Source status unknown — claims are unverified
Oxygen content and superconductivity in Y0.8Ca0.2Ba2Cu3Oy (y=6.03–6.89)
similarity 0.94J. Hejtmánek et al.
Source status unknown — claims are unverified
Superconducting-state enhancement of thermal conductivity in the cuprates: Correlation with the pair density
similarity 0.94Joshua L. Cohn
Source status unknown — claims are unverified
Dynamic correlated Cu(2) magnetic moments in superconducting YBa2(Cu0.96Co0.04)3Oy(y∼7)
similarity 0.94J. A. Hodges et al.
Source status unknown — claims are unverified
Metal-insulator transition and superconductivity in Y1−xPrxBa2Cu3O7
similarity 0.94Yupeng Wang et al.
Source status unknown — claims are unverified
Effect of magnetic field on the competition between superconductivity and charge order below the pseudogap state
similarity 0.94H. Meier et al.
Source status unknown — claims are unverified