RAMAN-SCATTERING IN HIGH-T(C) SUPERCONDUCTORS

被引：1
|
作者：
THOMSEN, C [1 ]
机构：
[1] MAX PLANCK INST FESTKORPERFORSCH,W-7000 STUTTGART 80,GERMANY
来源：
FESTKORPERPROBLEME-ADVANCES IN SOLID STATE PHYICS | 1991年 / 31卷
关键词：
D O I：
10.1007/BFb0107856
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Experimental self-energies of optical phonons in the high-T(c) superconductors turn out to be important for the characterization of the superconducting energy gap. Through electron-phonon coupling, which causes frequency, linewidth and intensity changes - so-called anomalies - of Raman and fir-active phonons at T(c), a gap value in RBa2Cu3O7-delta of 2DELTA/kT(c) = 5.0 +/- 0.1 was determined. This value may correspond to a minimum in an anisotropic gap in this material. We show that a slight admixture of Au appears to reduce the anisotropy.
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页码：1 / 17
页数：17
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