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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 22, Iss. 9 — Sep. 1, 2005
  • pp: 1994–2000

Experimental uncertainty in the far-infrared reflectivity of uniaxial superconductors

Michele Ortolani, Paolo Calvani, Stefano Lupi, Paola Maselli, Masaki Fujita, and Kazuyoshi Yamada  »View Author Affiliations


JOSA B, Vol. 22, Issue 9, pp. 1994-2000 (2005)
http://dx.doi.org/10.1364/JOSAB.22.001994


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Abstract

Most of the recently discovered superconductors, like all cuprates, MgB 2 , or Na x CoO 2 n H 2 O , are uniaxial crystals with metallic ab planes orthogonal to an insulating, or sometimes poorly conducting, c axis. The reflectivity R ab ( ω ) provides, through the optical conductivity σ ab ( ω ) , valuable information on the low-energy electrodynamics of these intriguing materials. However, in the far infrared, R ab ( ω ) 1 and a slight contamination from the c-axis response or an unsuitable choice of the extrapolation to ω = 0 may lead to large errors on σ ab ( ω ) . These issues are quantitatively discussed here with particular regard to La 2 x Sr x CuO 4 + y , one of the most-studied high- T c materials.

© 2005 Optical Society of America

OCIS Codes
(300.6250) Spectroscopy : Spectroscopy, condensed matter
(300.6300) Spectroscopy : Spectroscopy, Fourier transforms
(300.6340) Spectroscopy : Spectroscopy, infrared

Citation
Michele Ortolani, Paolo Calvani, Stefano Lupi, Paola Maselli, Masaki Fujita, and Kazuyoshi Yamada, "Experimental uncertainty in the far-infrared reflectivity of uniaxial superconductors," J. Opt. Soc. Am. B 22, 1994-2000 (2005)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-22-9-1994

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