Extended-drude model to fit infrared conductivity cuprate laser-ablated films

Citation
S. Pessaud et al., Extended-drude model to fit infrared conductivity cuprate laser-ablated films, INT J MOD B, 12(29-31), 1998, pp. 3323-3325
Citations number
6
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
ISSN journal
02179792 → ACNP
Volume
12
Issue
29-31
Year of publication
1998
Pages
3323 - 3325
Database
ISI
SICI code
0217-9792(199812)12:29-31<3323:EMTFIC>2.0.ZU;2-X
Abstract
An "extended-Drude" model, implying a simple form for the self-energy funct ion of the mobile charge-carrier response, has been applied to fitting the infrared and visible reflectivity spectra of simple cuprates. Excellent fit s are obtained in a wide spectral range, from 4 meV to 4 eV, with a very re stricted number of adjustable parameters. The optical conductivity obtained with this procedure is highly different from the Kramers-Kronig transforma tion of reflectivity spectra. The same procedure has been applied to charac terise the infrared conductivity of multi-target laser-ablated films built via intergrowth of YBa2Cu3O7 and MCuO2 (M = Ca, Sr).