INFLUENCE OF INELASTIC EFFECTS ON DIFFERENTIAL CONDUCTANCE OF A HIGH-T-C SUPERCONDUCTOR METAL JUNCTION

被引：20

作者：

GRAJCAR, M

PLECENIK, A

SEIDEL, P

PFUCH, A

机构：

[1] SLOVAK ACAD SCI,INST ELECT ENGN,BRATISLAVA 84239,SLOVAKIA

[2] UNIV JENA,INST FESTKORPERPHYS,D-07743 JENA,GERMANY

来源：

PHYSICAL REVIEW B | 1995年 / 51卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.51.16185

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Both linear conductance and smeared gaplike structure were observed in differential characteristics measured on point contacts using a gold tip and Bi2Sr2CaCu2O8+y thin films as well as Bi2Sr2CaCu2O8+y/SrTiO3 bilayers with different thickness of SrTiO3. These features were described in terms of inelastic processes. For theoretical description the Blonder-Tinkham-Klapwijk theory extended by Kirtley's model of the inelastic transport of quasiparticles through a normal metal-superconductor interface was used. In addition, we considered the shortening of quasiparticle lifetime τ due to the inelastic scattering in the superconductor near the interface. In agreement with theory a smeared gaplike structure as well as an increase or a decrease of conductance depending on the strength of the potential barrier corresponding to the SrTiO3 was obtained. © 1995 The American Physical Society.

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页码：16185 / 16189

页数：5

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