Nonequilibrium superconductivity and quasiparticle dynamics in YBa2Cu3O7-δ -: art. no. 140502

被引：107

作者：

Averitt, RD ^{[1
]}

Rodriguez, G ^{[1
]}

Lobad, AI ^{[1
]}

Siders, JLW ^{[1
]}

Trugman, SA ^{[1
]}

Taylor, AJ ^{[1
]}

机构：

[1] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

来源：

PHYSICAL REVIEW B | 2001年 / 63卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.63.140502

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have measured, using optical-pump terahertz-probe spectroscopy, the ultrafast (ab)-plane conductivity dynamics of quasiparticles and superconducting pairs in YBa2Cu3O7-delta (delta = 0, 0.5) thin films from 4 K to T-c. In optimally doped films, the recovery time for long-range phase-coherent pairing increases from similar to1.5 ps at 4 K to similar to3.5 ps near T-c, consistent with the closing of the superconducting gap. For underdoped films, the measured recovery time is temperature independent (3.5 ps) in accordance with the presence of a pseudogap. These results are compared to all optical pump-probe measurements at 1.5 eV.

引用

页数：4

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