Incommensurate composite structure of the superconductor Bi2Sr2CaCu2O8+δ
J. Etrillard, P. Bourges, C. T. Lin
DOI 10.1103/PhysRevB.62.150 · Physical Review B
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Abstract
We have performed elastic neutron scattering experiments, using a high-quality single crystal of the high-Tc superconductor Bi2Sr2CaCu2O8+δ. By a systematic comparison of intensities between superlattice reflections, we show that the one-dimensional incommensurate modulated model, usually used to interpret the structural characteristics, exhibits important failures. In contrast, in accordance with theoretical predictions [M. B. Walker and W. Que, Phys. Rev. B 45, 8085 (1992)], a composite structure made of two interpenetrating subsystems can alternatively describe the incommensurate structure and account for the hierarchy of the observed intensities.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8+δ 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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