POLARON FORMATION IN SUPERCONDUCTING CUPRATES - EVIDENCE FROM THE INFRARED REFLECTIVITY

Authors
LUPI S ROY P CALVANI P CAPIZZI M MASELLI P PAOLONE A BALESTRINO G CHEONG SW SADOWSKI W
Citation
S. Lupi et al., POLARON FORMATION IN SUPERCONDUCTING CUPRATES - EVIDENCE FROM THE INFRARED REFLECTIVITY, Nuovo cimento della Societa italiana di fisica. D, Condensed matter,atomic, molecular and chemical physics, biophysics, 16(10-11), 1994, pp. 1735-1741
Citations number
29
Categorie Soggetti
Physics
Journal title
Nuovo cimento della Societa italiana di fisica. D, Condensed matter,atomic, molecular and chemical physics, biophysics → ACNP
ISSN journal
03926737
Volume
16
Issue
10-11
Year of publication
1994
Pages
1735 - 1741
Database
ISI
SICI code
0392-6737(1994)16:10-11<1735:PFISC->2.0.ZU;2-5
Abstract
Evidence of polaron formation in superconducting cuprates is provided by infrared reflectivity spectra. In the Nd-Ce-Cu-O with T-c approxima te to 20 K, polaron formation corresponds to vibrational local modes i n the far-infrared and to a band in the mid-infrared built up through overtones and combination bands of these modes. A comparison with infr ared spectra taken by different groups on Y-Ba-Cu-O, and Tl-Sr-Ca-Cu-O suggests that polarons survive in the highest-T-c superconductors.