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.
|Number of pages||7|
|Journal||Journal of the Optical Society of America B: Optical Physics|
|Publication status||Published - 2005 Sep|
ASJC Scopus subject areas
- Statistical and Nonlinear Physics
- Atomic and Molecular Physics, and Optics