Crossover from coherent to incoherent electronic excitations in the normal state of Bi2Sr2CaCu2O8+δ -: art. no. 207003

被引：82

作者：

Kaminski, A ^{[1
]}

Rosenkranz, S

Fretwell, HM

Li, ZZ

Raffy, H

Randeria, M

Norman, MR

Campuzano, JC

机构：

[1] Univ Illinois, Dept Phys, Chicago, IL 60607 USA

[2] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

[3] Univ Coll Swansea, Dept Phys, Swansea SA2 8PP, W Glam, Wales

[4] Univ Paris 11, Phys Solides Lab, F-91405 Orsay, France

[5] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 20期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.90.207003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Angle resolved photoemission spectroscopy (ARPES) and resistivity measurements are used to explore the overdoped region of the high temperature superconductor Bi2Sr2CaCu2O8+delta. We find evidence for a new crossover line in the phase diagram between a coherent metal phase, for lower temperatures and higher doping, and an incoherent metal phase, for higher temperatures and lower doping. The former is characterized by two well-defined spectral peaks in ARPES due to coherent bilayer splitting and superlinear behavior in the resistivity, whereas the latter is characterized by a single broad spectral feature in ARPES and a linear temperature dependence of the resistivity.

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页数：4

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