Abstract

The interband optical conductivities Tl₂CaBa₂Cu₂O₈ and Tl₂Ca₂Ba₂Cu₃O₁₀ superconductors are calculated by of using a first-principles method. The results for the two compounds are quite similar, both showing strong anisotropy behavior and a strong momentum matrix effect. The complex dielectric function, the electron energy-loss function, and the reflectivity spectrum are then derived. The values of the static dielectric constant ∊₀ and the plasmon frequency ω_p are also obtained. These optical properties are discussed together with similar results for the YBa₂Cu₃O₇ and Bi₂CaSr₂Cu₂O₈ superconductors. Implications of these results forthe possible mechanism in these compounds are discussed.

© 1989 Optical Society of America

Use of x-ray absorption spectroscopy in electronic structure studies of high-Tc superconducting oxides

L. Soderholm and G. L. Goodman
J. Opt. Soc. Am. B 6(3) 483-489 (1989)

Preparation, characterization, and far-infrared study of ceramic high-Tc superconductors

T. Zetterer, W. Ose, J. Schützmann, H. H. Otto, P. E. Obermayer, N. Tasler, H. Lengfellner, G. Lugert, J. Keller, and K. F. Renk
J. Opt. Soc. Am. B 6(3) 420-435 (1989)

Extensive study of the optical spectra for high-temperature superconducting oxides and their related materials from the infrared to the vacuum-ultraviolet energy region

S. Tajima, H. Ishii, T. Nakahashi, T. Takagi, S. Uchida, M. Seki, S. Suga, Y. Hidaka, M. Suzuki, T. Murakami, K. Oka, and H. Unoki
J. Opt. Soc. Am. B 6(3) 475-482 (1989)

Diffuse reflectance and its relationship to oxygen content in YBa₂Cu₃O₇₋δ and Bi_2.1(CaxSr₁₋x)n₊₁CunO₂n₊₄₊δ₍n_{= 1, 2)}

A. Bittar, M. P. Staines, and R. G. Buckley
J. Opt. Soc. Am. B 6(3) 385-388 (1989)

Infrared studies of single-crystal La₂₋xSrxCuO₄₋δ and YBa₂Cu₃O₇₋δ

A. C. Nichol, F. L. Pratt, W. Hayes, C. Chen, B. E. Watts, and B. M. Wanklyn
J. Opt. Soc. Am. B 6(3) 403-408 (1989)