FEMTOSECOND THERMOMODULATION STUDY OF HIGH-TC SUPERCONDUCTORS

被引：79

作者：

BRORSON, SD

KAZEROONIAN, A

FACE, DW

CHENG, TK

DOLL, GL

DRESSELHAUS, MS

DRESSELHAUS, G

IPPEN, EP

VENKATESAN, T

WU, XD

INAM, A

机构：

[1] MIT,ELECTR RES LAB,CAMBRIDGE,MA 02139

[2] MIT,DEPT PHYS,CAMBRIDGE,MA 02139

[3] MIT,CTR MAT SCI & ENGN,CAMBRIDGE,MA 02139

[4] MIT,FRANCIS BITTER NATL MAGNET LAB,CAMBRIDGE,MA 02139

[5] BELLCORE,RED BANK,NJ 07701

[6] RUTGERS STATE UNIV,DEPT PHYS,PISCATAWAY,NJ 08854

来源：

SOLID STATE COMMUNICATIONS | 1990年 / 74卷 / 12期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0038-1098(90)90997-P

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We present the first femtosecond pump-prove measurements of the room temperature optical properties of high-Tc superconductors. Three oriented superconducting thin-films were studied: YBa2Cu3O7-δ, Bi2Sr2CaCu2O8+z, and Bi2Sr2Ca2Cu3O10+. The observed changes in ε2 can be related to the dynamics of the Cu d to O p band charge transfer excitation occurring in the Cu O planes. By depleting the YBa2Cu3O7-δ sample of oxygen, we simultaneously vary the Fermi level and the Tc. The sign of Δε2 is found to depend on the Fermi level position, while the recovery time is found to increase markedly with decreasing Tc. © 1990.

引用

页码：1305 / 1308

页数：4

共 25 条

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