Renormalization of spectral line shape and dispersion below Tc in Bi2Sr2CaCu2O8+δ

被引：303

作者：

Kaminski, A ^{[1
]}

Randeria, M

Campuzano, JC

Norman, MR

Fretwell, H

Mesot, J

Sato, T

Takahashi, T

Kadowaki, K

机构：

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

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

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

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

[5] Swiss Fed Inst Technol, Neutron Scattering Lab, CH-5232 Villigen, Switzerland

[6] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

[7] Tohoku Univ, Dept Phys, Sendai, Miyagi 980, Japan

[8] Univ Tsukuba, Inst Mat Sci, Tsukuba, Ibaraki 305, Japan

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 06期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.86.1070

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Angle-resolved photoemission data in the superconducting state of Bi2Sr2CaCu2O8+delta show a kink in the dispersion along the zone diagonal, which is related via a Kramers-Kronig analysis to a drop in the low energy scattering rate. As one moves towards (pi ,0), this kink evolves into a spectral dip. The occurrence of these anomalies in the dispersion and line shape throughout the zone indicates the presence of a new energy scale in the superconducting state.

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页码：1070 / 1073

页数：4

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