THE INFLUENCE OF NONMAGNETIC IMPURITY ON COLLECTIVE EXCITON-LIKE OSCILLATIONS IN A 2-BAND SUPERCONDUCTOR

被引：4
|
作者：
PALISTRANT, ME
KOCHORBE, FG
机构：
[1] Institute of Applied Physics, Academy of Sciences of Moldova, 27708 Kishinev
来源：
PHYSICA C | 1995年 / 241卷 / 3-4期
关键词：
D O I：
10.1016/0921-4534(94)02358-1
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The influence of non-magnetic impurity on the collective oscillations in two-band superconductors due to fluctuations of phases of order parameters of different bands is studied. The system of equations for the vertex functions which is valid for arbitrary carrier concentrations is obtained. The equation for frequency of the collective oscillations in two-band superconductors with phonon and non-phonon superconductivity mechanism is obtained. It is shown that the two exciton-like frequencies caused by the interband interaction and by the impurity arise.
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页码：345 / 352
页数：8
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