Far-infrared c-axis conductivity of flux-grown Y1-xPrxBa2Cu3O7 single crystals studied by spectral ellipsometry

被引：15

作者：

Bernhard, C

Holden, T

Golnik, A

Lin, CT

Cardona, M

机构：

[1] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

[2] Univ Warsaw, Inst Expt Phys, PL-00681 Warsaw, Poland

来源：

PHYSICAL REVIEW B | 2000年 / 62卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.62.9138

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The far-infrared c-axis conductivity of flux-grown Y1-xPrxBa2Cu3O7 single crystals with 0.2 less than or equal to x less than or equal to 0.5 has been studied by spectral ellipsometry. We find that the e-axis response exhibits spectral features similar to deoxygenated underdoped YBa2Cu3O7-delta, i.e., a pseudogap develops in the normal state, the phonon mode at 320 cm(-1) exhibits an anomalous T dependence, and an additional absorption peak forms at low temperature. This suggests that the T-c suppression in flux grown Pr-substituted crystals is caused by a decrease of the hole content and/or by carrier localization rather than by pair breaking.

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页码：9138 / 9142

页数：5

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