Abstract

The optical reflectivity spectra of magnetically oriented YBa₂Cu₃O_{7 −δ} are reported over a wide energy range from 50 to 24 000 cm⁻¹ (6 meV to 3 eV). A strong optical anisotropy is observed, with most phonon modes associated with the E ‖ c spectrum. An anisotropic effective-medium theory is used to permit direct comparison of these data with spectra from unoriented grains. The excitonic feature is found to be considerably more intense in the unoriented sample.

© 1989 Optical Society of America

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)

Raman-scattering studies of coupled modes and superconducting gap excitations in single-crystal YBa₂Cu₃O_7-δ

S. L. Cooper, F. Slakey, M. V. Klein, J. P. Rice, E. D. Bukowski, and D. M. Ginsberg
J. Opt. Soc. Am. B 6(3) 436-439 (1989)

Phonon-mode characterization of orthorhombic and tetragonal YBa₂Cu₃O_7-δ single crystals by Raman spectroscopy

L. V. Gasparov, G. A. Emel’chenko, V. D. Kulakovskii, O. V. Misochko, V. B. Timofeev, and E. I. Rashba
J. Opt. Soc. Am. B 6(3) 440-447 (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)

Dependence of the infrared absorption on oxygen deficiency in the YBa₂Cu₃O₇₋y superconducting system

G. Ruani, C. Taliani, R. Zamboni, D. Cittone, and F. C. Matacotta
J. Opt. Soc. Am. B 6(3) 409-414 (1989)