X-ray absorption measurements on high-Tc superconductors: Cu-valence and cation-bond-length effects
Y. Jeon, F. Lu, H. Jhans, S. A. Shaheen, G. Liang, M. Croft, P. H. Ansari, K. V. Ramanujachary, E. A. Hayri, S. M. Fine, S. Li, X. H. Feng, M. Greenblatt, L. H. Greene, J. M. Tarascon
DOI 10.1103/PhysRevB.36.3891 · Physical Review B
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Abstract
We present the results of Cu and Y K-edge and rare-earth and Ba L-edge x-ray absorption measurements on a series of new quaternary high-Tc superconducting compounds La2−xSrxCuO4−y and RBa2Cu3O7 (R=Y,Er,andHo). The Cu K-edge results are shown to reflect the Cu valence state in these materials. The other measurements are discussed in the context of binary rare-earth oxides and the quantitative influence of bond lengths on continuum resonances in such spectra.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2-xSrxCuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| ErBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| HoBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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