AB-plane optical spectra of iodine-intercalated Bi1.9Pb0.1Sr2CaCu2O8+δ: Normal and superconducting properties

H. L. Liu, D. B. Tanner, H. Berger, G. Margaritondo

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We report on the ab-plane optical reflectance of an iodine-intercalated Bi1.9Pb0.1Sr2CaCu2O8+δ single crystal in the 80-40 000 cm-1 (10 meV-5 eV) frequency range and at temperatures between 10 and 300 K. As compared to the iodine-free Bi2Sr2CaCu2O8+δ, 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 CuO2 planes. This behavior is a consequence of charge transfer between intercalated iodine atoms and the CuO2 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 Å, slightly larger than the 1860 Å found in iodine-free Bi2Sr2CaCu2O8+δ.

Original languageEnglish
Pages (from-to)8962-8969
Number of pages8
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume59
Issue number13
DOIs
Publication statusPublished - 1999 Jan 1

Fingerprint

Iodine
iodine
optical spectrum
Optical conductivity
Hole concentration
Intercalation
intercalation
oscillator strengths
sum rules
Charge transfer
penetration
frequency ranges
charge transfer
Doping (additives)
Single crystals
Scattering
low frequencies
reflectance
Atoms
conductivity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

AB-plane optical spectra of iodine-intercalated Bi1.9Pb0.1Sr2CaCu2O8+δ : Normal and superconducting properties. / Liu, H. L.; Tanner, D. B.; Berger, H.; Margaritondo, G.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 59, No. 13, 01.01.1999, p. 8962-8969.

Research output: Contribution to journalArticle

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