ISSN:
1434-6036
Keywords:
PACS. 78.20.-e Optical properties of bulk materials and thin films - 74.72.Jt Other cuprates
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract: The optical reflectivity as a function of temperature of the title compound for x =0, 5 and 12 has been measured over a broad spectral range from 4 meV up to 12 eV. Our findings suggest a very anisotropic dynamics of the charge excitation spectrum when measuring along or perpendicular to the ladders. Moreover, a metal-insulator transition develops at low temperatures, leading to a suppression of Drude spectral weight in the far and mid-infrared spectral range. We identify this behaviour as a consequence of the localization effects for small Ca substitution, and of the possible formation of a charge density wave condensate for large Ca substitution.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s100510050552
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