Femtosecond time-resolved study of the energy and temperature dependence of hot-electron lifetimes in Bi2Sr2CaCu2O8+δ

被引：59

作者：

Nessler, W

Ogawa, S

Nagano, H

Petek, H ^{[1
]}

Shimoyama, J

Nakayama, Y

Kishio, K

机构：

[1] Hitachi Ltd, Adv Res Lab, Hatoyama, Saitama 3500395, Japan

[2] Univ Tokyo, Dept Superconduct, Bunkyo Ku, Tokyo 113, Japan

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 20期

关键词：

D O I：

10.1103/PhysRevLett.81.4480

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Electron lifetimes in a high-T-c cuprate Bi2Sr2CaCu2O8+delta are measured directly in rime domain by the interferometric two-photon time-resolved photoemission technique. The lifetimes decrease from 60 to 10 fs in an energy range of 1.4 to 3.0 eV above E-F With approximately (E - E-F)(-2) energy scaling of a normal, Fermi liquid metal. However, anomalous behavior shows up in a pronounced temperature dependence where the Lifetimes of the 1.6 eV electrons decrease by 30% from 40 to 340 K. This study helps to define the nature of inelastic carrier scattering processes in the normal state of high-T-c cuprates. [S0031-9007(98)07645-9].

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收藏

页码：4480 / 4483

页数：4

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