Presence of tri-iodide ions in iodine-intercalated IBi2Sr2CaCu2O8 superconductors
Pham V. Huong, A. L. Verma
DOI 10.1103/PhysRevB.48.9869 · Physical Review B
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Abstract
Stage-1 iodine-intercalated IBi2Sr2CaCu2O8 single crystals with Tc=78 K were studied by Raman microspectroscopy in comparison with undoped Bi2Sr2CaCu2O8. Evidence is shown for the existence of an asymmetrical I3− state and a weak interaction is revealed between this ion and the adjacent Bi-O layers. The phonon coupling that initially exists in the identical, close, and staggered Bi-O bonds along the c axis, disappears as a result of the iodine intercalation in the host network where the Bi-O bonds become aligned along this c axis.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 97 | Pressure not reported | zero_resistance |
| IBi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 78 | Pressure not reported | unknown |
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