Experimental uncertainty in the far-infrared reflectivity of uniaxial superconductors

Michele Ortolani, Paolo Calvani, Stefano Lupi, Paola Maselli, Masaki Fujita, Kazuyoshi Yamada

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


Most of the recently discovered superconductors, like all cuprates, MgB2, or NaxCoO2 · nH2O, are uniaxial crystals with metallic ab planes orthogonal to an insulating, or sometimes poorly conducting, c axis. The reflectivity Rab(ω) provides, through the optical conductivity σab(ω), valuable information on the low-energy electrodynamics of these intriguing materials. However, in the far infrared. Rab(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 La2-xSrxCuO4+y, one of the most-studied high-Tc materials.

Original languageEnglish
Pages (from-to)1994-2000
Number of pages7
JournalJournal of the Optical Society of America B: Optical Physics
Issue number9
Publication statusPublished - 2005 Sep
Externally publishedYes

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Atomic and Molecular Physics, and Optics


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