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- W1643498000 abstract "We report on the ab-plane optical reflectance of an iodine-intercalated ${mathrm{Bi}}_{1.9}{mathrm{Pb}}_{0.1}{mathrm{Sr}}_{2}{mathrm{CaCu}}_{2}{mathrm{O}}_{8+mathrm{ensuremath{delta}}}$ single crystal in the 80--40 000 ${mathrm{cm}}^{mathrm{ensuremath{-}}1}$ (10 meV--5 eV) frequency range and at temperatures between 10 and 300 K. As compared to the iodine-free ${mathrm{Bi}}_{2}{mathrm{Sr}}_{2}{mathrm{CaCu}}_{2}{mathrm{O}}_{8+mathrm{ensuremath{delta}}},$ we find that the visible-ultraviolet interband transitions are strongly modified after intercalation. Estimates of the low-frequency spectral weight indicate that there is an increase of hole concentration in the ${mathrm{CuO}}_{2}$ planes. This behavior is a consequence of charge transfer between intercalated iodine atoms and the ${mathrm{CuO}}_{2}$ sheets leading to an ionized iodine species. The ab-plane optical conductivity is analyzed in both the one-component and the two-component pictures, suggesting that the intercalated iodine does not have any significant effect on the in-plane scattering rate. In the superconducting state, a sum-rule evaluation finds that the superfluid contains about 25% of the total doping-induced, or nearly 86% of the free-carrier oscillator strength in the normal state. The value of the superconducting penetration depth is estimated to be 1980 AA{}, slightly larger than the 1860 AA{} found in iodine-free ${mathrm{Bi}}_{2}{mathrm{Sr}}_{2}{mathrm{CaCu}}_{2}{mathrm{O}}_{8+mathrm{ensuremath{delta}}}.$" @default.
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- W1643498000 date "1999-04-01" @default.
- W1643498000 modified "2023-10-01" @default.
- W1643498000 title "ab-plane optical spectra of iodine-intercalatedBi1.9Pb0.1Sr2CaCu2O8+δ:Normal and superconducting properties" @default.
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- W1643498000 doi "https://doi.org/10.1103/physrevb.59.8962" @default.
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