Ultrafast Phase-Coherence in Normal State of Underdoped Bi2Sr2CaCu2O8 + δ Thin Film

被引：0
|
作者：
H. Murakami
M. Tonouchi
T. Uchiyama
I. Iguchi
Z. Wang
机构：
[1] Osaka University,Research Center for Superconductor Photyonics
[2] CREST-JST,Department of Physics
[3] Tokyo Institute of Technology,Communication Research Laboratory
[4] CREST-JST,undefined
[5] Kansai Advanced Research Center,undefined
来源：
Journal of Superconductivity | 2002年 / 15卷
关键词：
terahertz; Bi; Sr; CaCu; O; pseudogap; relaxation time;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A phase-sensitive time-domain terahertz-transmission spectroscopy was carried out on a c-axis oriented underdoped Bi2Sr2CaCu2O8 + δ thin film. We directly extracted the complex refractive index and conductivity at frequencies from 0.3 to 1.5 THz by numerically solving the observed complex transmittance without Kramers–Kronig analysis. The frequency-resolved real and imaginary part of the conductivity (1.0 THz < f) showed a measurable increase below the characteristic temperature of T* ∼ 210 K because of the appearance of partial phase-coherence with an ultrashort lifetime less than about 1 ps.
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页码：345 / 350
页数：5
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