Phonon structure in point-contact spectra of MgB2

被引：0
|
作者：
Yanson, IK [1 ]
机构：
[1] Natl Acad Sci, BI Verkin Inst Low Temp Phys & Engn, UA-61103 Kharkov, Ukraine
来源：
New Challenges in Superconductivity: Experimental Advances and Emerging Theories | 2005年 / 183卷
关键词：
MgB2; point-contact spectroscopy; two-band/gap superconductivity; electronphonon interaction;
D O I：
10.1007/1-4020-3085-1_36
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
In strong-coupling superconductors with a short electron mean free path the self-energy effects in the superconducting order parameter play a major role in the phonon manifestation of the point-contact spectra at above-gap energies. We compare the expressions for the nonlinear conductivity of tunnel, ballistic, and diffusive point-contacts and show that these expression are similar and correspond to the measurements of the phonon structure in the point-contact spectra for the pi-band of MgB2.
引用
收藏
页码：249 / 258
页数：10
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