ELECTRON-TUNNELING IN SUPERCONDUCTING BA0.6K0.4BIO3

被引：16

作者：

MORALES, F ^{[1
]}

ESCUDERO, R ^{[1
]}

HINKS, DG ^{[1
]}

ZHENG, Y ^{[1
]}

机构：

[1] ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1990年 / 169卷 / 3-4期

关键词：

D O I：

10.1016/0921-4534(90)90190-P

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report tunneling measurements using superconducting bulk samples of Ba0.6K0.4BiO3 and evaporated counterelectrodes of Sn. With our procedure, we find reproducible tunneling characteristics that show the gap feature and high frequency structure in the dI/dV versus V curves. This structure may be related to the phonon spectrum or to the excitations that give rise to superconductivity in these ceramic materials. The energy gap evolution with temperature follows BCS-like behavior, with ratio 2Δ/KBTc at T=0 K in the range of intermediate coupling. © 1990.

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页码：294 / 298

页数：5

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