Evidence for an energy scale for quasiparticle dispersion in Bi2Sr2CaCu2O8

被引：256

作者：

Bogdanov, PV ^{[1
]}

Lanzara, A

Kellar, SA

Zhou, XJ

Lu, ED

Zheng, WJ

Gu, G

Shimoyama, JI

Kishio, K

Ikeda, H

Yoshizaki, R

Hussain, Z

Shen, ZX

机构：

[1] Stanford Univ, Dept Phys, Stanford, CA 94305 USA

[2] Stanford Univ, Stanford Synchrotron Radiat Lab, Stanford, CA 94305 USA

[3] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA

[4] Univ New S Wales, Sch Phys, Kensington, NSW 2033, Australia

[5] Univ Tokyo, Dept Appl Chem, Tokyo 1138656, Japan

[6] Univ Tsukuba, Inst Appl & Cryogen Ctr, Tsukuba, Ibaraki 305, Japan

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 12期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.85.2581

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Quasiparticle dispersion in Bi2Sr2CaCu2O8 is investigated with improved angular resolution as a function of temperature and doping. Unlike the linear dispersion predicted by the band calculation, the data show a sharp break in dispersion at 50 +/- 15 meV binding energy where the velocity changes by a factor of 2 or more. This change provides an energy scale in the quasiparticle self-energy. This break in dispersion is evident at and away from the cl-wave node line, but the magnitude of the dispersion change decreases with temperature and with increasing doping.

引用

页码：2581 / 2584

页数：4

共 41 条

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