Infrared properties of La$_{2-x}$(Ca,Sr)$_x$CaCu$_2$O$_{6+δ}$ single crystals

Details Infrared properties of La$_{2-x}$(Ca,Sr)$_x$CaCu$_2$O$_{6+δ}$ single crystals Infrared properties of La$_{2-x}$(Ca,Sr)$_x$CaCu$_2$O$_{6+δ}$ single crystals

2002-11-12

arxiv.org/abs/cond-mat/0211224v1

Phys. Rev. B 67, 134526 (2003)

Physics

Condensed Matter

Superconductivity

5 pages, 3 figures

Scientific paper

10.1103/PhysRevB.67.134526

The in-plane optical properties of two crystals of the bilayer cuprate \LSxCCO, one with excess Ca and $x=0.10$ and the other with Sr and $x=0.15$, were investigated over the frequency range of 45--25000 cm$^{-1}$. The optical conductivity has been derived from Kramers-Kronig transformation. Each crystal exhibits a peak at around 15000 cm$^{-1}$ which corresponds to the charge-transfer gap of the parent insulator. With increasing carrier density, spectral weight shifts from the CT excitation to the low-$\omega$ region. For the superconducting sample ($x=0.15$), the optical conductivity displays a peak in the far-infrared region, which shifts toward zero frequency with decreasing temperature. The temperature-dependent behavior favors a dynamical localization picture. A ``pseudogap'' feature is observed in the low-frequency reflectance and the scattering rate spectra. Both the energy scale and the temperature dependence of the ``pseudogap'' are similar to other bilayer cuprates.

Affiliated with

Also associated with

No associations

Rating

Infrared properties of La$_{2-x}$(Ca,Sr)$_x$CaCu$_2$O$_{6+δ}$ single crystals does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Infrared properties of La$_{2-x}$(Ca,Sr)$_x$CaCu$_2$O$_{6+δ}$ single crystals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Infrared properties of La$_{2-x}$(Ca,Sr)$_x$CaCu$_2$O$_{6+δ}$ single crystals will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-18896