Thermopower of Bi2Sr2Ca1-xRxCu2Oy (R = Gd, Pr) single crystals

Citation
X. Zhao et al., Thermopower of Bi2Sr2Ca1-xRxCu2Oy (R = Gd, Pr) single crystals, J PHYS-COND, 13(19), 2001, pp. 4303-4311
Citations number
36
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF PHYSICS-CONDENSED MATTER
ISSN journal
0953-8984 → ACNP
Volume
13
Issue
19
Year of publication
2001
Pages
4303 - 4311
Database
ISI
SICI code
0953-8984(20010514)13:19<4303:TOB(=G>2.0.ZU;2-F
Abstract
The temperature and carrier concentration dependence of the thermopower (TE P) S in Bi2Sr2Ca1-xRxCu2Oy (R = Gd, Pr) single crystals were carefully stud ied. Upon Gd or Pr doping, the superconductivity changes systematically fro m overdoping to underdoping with the TEP increasing monotonically. S(T)/S(T -scale) against T/T-scale for all the underdoped crystals can be well scale d into a universal curve, where T-scale is the temperature at which S begin s to deviate from T-linear behaviour. This scaling behaviour is assumed to correlate with the opening of the pseudogap. Furthermore, the temperature d ependence of the TEP is analysed and discussed in terms of two different tw o-band models and the Nagaosa-Lee model.