X-ray absorption studies of La2−x(Ba,Sr)xCuO4 superconductors
J. M. Tranquada, S. M. Heald, A. Moodenbaugh, M. Suenaga
DOI 10.1103/PhysRevB.35.7187 · 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
X-ray absorption spectroscopy has been used to study superconducting compounds with the composition La2−x(Ba,Sr)xCuO4 for x=0 to 0.3 X-ray absorption measurements at the Cu K edge indicate that the copper valence is 2+ for all dopant concentrations, and that the mean square relative displacements for Cu-O nearest neighbors are approximately the same for all compositions, with an average characteristic temperature of 570±30 K. Measurements at the La L3 edge suggest that the number of empty states near the Fermi energy with O 2p character increases with dopant concentration.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La1.9Sr0.1CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 29 | Pressure not reported | onset |
| La1.85Sr0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 36 | Pressure not reported | onset |
| La1.8Sr0.2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 28 | Pressure not reported | onset |
| La1.85Ba0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 26 | Pressure not reported | onset |
Similar papers
Electronic structure of high-Tc superconductors from soft-x-ray absorption
similarity 0.96D. D. Sarma et al.
Source status unknown — claims are unverified
Soft x-ray absorption studies on high-Tc superconducting oxides
similarity 0.96D. Sondericker et al.
Source status unknown — claims are unverified
X-ray-absorption near-edge-structure study of La2−x(Ba,Sr)xCuO4−y superconductors
similarity 0.96J. M. Tranquada et al.
Source status unknown — claims are unverified
Composition-dependent superconductivity in La2−xSrxCuO4−δ
similarity 0.95R. B. van Dover et al.
Source status unknown — claims are unverified
X-ray-absorption studies of the high-Tc superconductors La1.8Sr0.2CuO4 and La1.8Ba0.2CuO4
similarity 0.95J. B. Boyce et al.
Source status unknown — claims are unverified
Low-field microwave absorption in the superconducting copper oxides
similarity 0.95K. W. Blazey et al.
Source status unknown — claims are unverified