Temperature and doping dependence of the Bi-Sr-Ca-Cu-O electronic structure and fluctuation effects

被引：63

作者：

Loeser, AG ^{[1
]}

Shen, ZX ^{[1
]}

Schabel, MC ^{[1
]}

Kim, C ^{[1
]}

Zhang, M ^{[1
]}

Kapitulnik, A ^{[1
]}

Fournier, P ^{[1
]}

机构：

[1] UNIV MARYLAND,DEPT PHYS,COLLEGE PK,MD 20742

来源：

PHYSICAL REVIEW B | 1997年 / 56卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.56.14185

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Angle-resolved photoemission data from bulk Bi2Sr2CaCu2O8+delta show changes in the excitation gap and line shape versus both doping and temperature. We employ two different quantitative analyses; one to search for a gap closing temperature T*, and the other to further characterize its relation to the superconducting transition temperature T-c. We present observations of the sharp feature near crystal momentum k=(1,0) in superconducting spectra, and its temperature and doping dependence. This temperature dependence is analyzed together with the shift in the spectral weight's lowest binding energy (leading edge). Finally, we find evidence for persistence of this sharp peak at temperatures slightly above T-c.

引用

页码：14185 / 14189

页数：5

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