Stripe structure in the CuO2 plane of perovskite superconductors
A. Bianconi, N. L. Saini, T. Rossetti, A. Lanzara, A. Perali, M. Missori, H. Oyanagi, H. Yamaguchi, Y. Nishihara, D. H. Ha
DOI 10.1103/PhysRevB.54.12018 · Physical Review B
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Abstract
The Cu-O pair-distribution function in a Bi2Sr2CaCu2O8+y superconductor has been measured by polarized Cu K-edge extended x-ray-absorption fine structure at T<Tc. The results show an anomalous long Cu-O (planar) distance, 1.96 Å, assigned to distorted CuO2 stripes of width W intercalated with undistorted stripes of width L. From the measurement of L=15±0.5 Å we have calculated the energies En of the bottom of the one-dimensional subbands of the superlattice and found that the Fermi level EF is tuned to a ‘‘shape resonance’’ EF-En<ħωD, where ωD is the Debye frequency, giving the Tc amplification. © 1996 The American Physical Society.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8+y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 84 | Pressure not reported | unknown |
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