Anomalous infrared properties of the oxygen deficient cuprate la(8-x)sr(x)cu(8)o(20)

Authors
Lucarelli, A Lupi, S Calvani, P Maselli, P Bianconi, A Saini, NL De Marzi, G Roy, P Ito, T Oka, K
Citation
A. Lucarelli et al., Anomalous infrared properties of the oxygen deficient cuprate la(8-x)sr(x)cu(8)o(20), INT J MOD B, 14(29-31), 2000, pp. 3542-3547
Citations number
7
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
ISSN journal
02179792 → ACNP
Volume
14
Issue
29-31
Year of publication
2000
Pages
3542 - 3547
Database
ISI
SICI code
0217-9792(200012)14:29-31<3542:AIPOTO>2.0.ZU;2-7
Abstract
We present the first infrared conductivity spectra on single crystals of ox ygen deficient cuprate La8-xSrxCu8O20. The infrared conductivity for a samp le with x = 2.24 behaves as a function of temperature according to a conven tional Drude model. On the other hand, the low energy excitations for a sam ple with x = 1.56 are itinerant polarons. Below T = 100 K, polarons localiz e and this effect can be related to the anomalies present in the transport and magnetic properties around this temperature.