Generalized Frenkel-Kontorova model for structural modulations in bismuth high-Tc superconductors and related compounds
Weiming Que, M. B. Walker
DOI 10.1103/PhysRevB.46.14772 · Physical Review B
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Abstract
Structural modulations in bismuth-based high-Tc superconductors and in compounds that are isostructural with bismuth superconductors are investigated by constructing a generalized Frenkel-Kontorova model. The presence of principal and subsidiary maxima in the model potential due to Bi ions leads to a rich variety of ground-state ion configurations. The formation of zigzag Bi-O chains in some of these compounds with the insertion of extra oxygen can be simulated by this model. We find that the space-group B2/m11 is a possible candidate for Bi10Sr15Fe10O46, which is isostructural with the n=2 phase of the bismuth superconductors Bi2Sr2Can−1CunO4+2n+δ.
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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