DETERMINATION OF THE SUPERCONDUCTING GAP IN RBA2CU3O7-DELTA

被引：312
作者：
FRIEDL, B
THOMSEN, C
CARDONA, M
机构：
[1] Max-Planck-Institut für Festkörperforschung, D-7000 Stuttgart 80
来源：
PHYSICAL REVIEW LETTERS | 1990年 / 65卷 / 07期
关键词：
D O I：
10.1103/PhysRevLett.65.915
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The anomalous broadening of the B1g-like phonon of RBa2Cu3O7- observed in Raman scattering is studied as a function of phonon frequency by substituting various rare earths for R. The onset of broadening starts abruptly at a phonon energy which allows us to unambiguously determine a single, sharp superconducting gap at 2=316 cm-1. 2/kTc=4.95±0.10, i.e., RBa2Cu3O7-is a strong-coupling superconductor. We find qualitative and quantitative agreement with theory. © 1990 The American Physical Society.
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页码：915 / 918
页数：4
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