PHONON SOFTENING IN CERAMIC SUPERCONDUCTORS

被引：0

作者：

PRASSIDES, K

ROSSEINSKY, MJ

DIANOUX, AJ

DAY, P

机构：

[1] AT&T BELL LABS,MURRAY HILL,NJ 07974

[2] INST MAX VON LAUE PAUL LANGEVIN,F-38042 GRENOBLE,FRANCE

来源：

PHYSICA B | 1992年 / 180卷

关键词：

D O I：

10.1016/0921-4526(92)90769-O

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The phonon density-of-states of the ceramic superconductors Ba0.6K0.4BiO3, BaPb0.75Bi0.25O3 and BaPb0.75Sb0.25O3 has been measured by the neutron time-of-flight technique to very low energy transfer. Measurements on metallic BaPbO3 and semiconducting BaBiO3 are also reported. Phonon anomalies, associated with high-frequency oxygen breathing modes are observed. The low-frequency region also reveals additional features that vary across the series. The results are consistent with phonon-mediated mechanisms for superconductivity.

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页码：393 / 395

页数：3

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