Temperature and doping dependence of the Bi2.1Sr1.9CaCu2O8+delta pseudogapand superconducting gap

Authors
Matsuda, A Sugita, S Watanabe, T
Citation
A. Matsuda et al., Temperature and doping dependence of the Bi2.1Sr1.9CaCu2O8+delta pseudogapand superconducting gap, PHYS REV B, 60(2), 1999, pp. 1377-1381
Citations number
17
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B-CONDENSED MATTER
ISSN journal
01631829 → ACNP
Volume
60
Issue
2
Year of publication
1999
Pages
1377 - 1381
Database
ISI
SICI code
0163-1829(19990701)60:2<1377:TADDOT>2.0.ZU;2-X
Abstract
The temperature and doping dependence of Bi2.1Sr1.9CaCu2O8+delta vacuum tun neling spectra was measured. The tunneling spectra show a clear gaplike fea ture for almost all the measured temperatures (10-300 K) and doping levels [overdoped (T(c)similar to 80 K) to underdoped (T(c)similar to 80 K), via o ptimum-doped (T(c)similar to 90 K)]. The superconducting gap structure belo w T-c develops into a pseudogap above T-c. The model analysis based on the BCS-type density of states showed a sudden increase in the gap value and in elastic scattering rate at T-c. [S0163-1829(99)14825-2].