Evidence for two coupled subsystems in the superconducting state of La2-xSrxCuO4 -: art. no. 214505

被引：14

作者：

Rast, S

Schneider, ML

Onellion, M

Zeng, XH

Si, WD

Xi, XX

Abrecht, M

Ariosa, D

Pavuna, D

Ren, YH

Lüpke, G

Perakis, I

机构：

[1] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

[2] Penn State Univ, Dept Phys, University Pk, PA 16802 USA

[3] Ecole Polytech Fed Lausanne, CH-1015 Lausanne, Switzerland

[4] Coll William & Mary, Dept Appl Sci, Williamsburg, VA USA

[5] Univ Crete, Dept Phys, Iraklion 71003, Greece

来源：

PHYSICAL REVIEW B | 2001年 / 64卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.87.214505

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We used a pump-probe technique to measure the transient change of optical reflectivity of both La2-xSrxCuO4, of various dopings, and slightly underdoped YBa2Cu3O7-x and NdBa2Cu3O7-x thin films. For the La2-xSrxCuO4 films, our data demonstrate the coexistence, in the superconducting state, of two coupled subsystems with different relaxation times and different contributions to the optical reflectivity. One subsystem is associated with the superconducting phase. By contrast. the data from YBa2Cu3O7-x, and NdBa2Cu3O7-x shows that the coupling between the two subsystems is weak or absent.

引用

页数：5

共 23 条

[1] THEORY OF THERMAL RELAXATION OF ELECTRONS IN METALS [J].