Spatially heterogeneous character of superconductivity in MgB2 as revealed by local probe and bulk measurements

被引：8

作者：

Ekino, T ^{[1
]}

Gabovich, AM

Li, MS

Takasaki, T

Voitenko, AI

Akimitsu, J

Fujii, H

Muranaka, T

Pekala, M

Szymczak, H

机构：

[1] Hiroshima Univ, Fac Integrated Arts & Sci, Higashihiroshima 7398521, Japan

[2] Inst Phys, UA-03028 Kiev, Ukraine

[3] Inst Phys, PL-02668 Warsaw, Poland

[4] Hiroshima Univ, Grad Sch Adv Sci Matter, Higashihiroshima 7398530, Japan

[5] Aoyama Gakuin Univ, Dept Phys, Kanagawa 2298558, Japan

[6] Univ Warsaw, Dept Chem, PL-02089 Warsaw, Poland

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2005年 / 426卷

关键词：

MgB2; tunnel spectra; break junction; heat capacity;

D O I：

10.1016/j.physc.2005.03.029

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Controversial tunnel and point-contact experimental data on superconducting gap values in MgB2 are analyzed and interpreted in terms of the spatial inhomogeneity and the proximity effect appropriate to this layered compound. Existing specific heat measurements are explained in the same way. Break-junction tunnel studies of polycrystalline MgB2 samples are carried out and a clear-cut multiplicity of gaps is observed, although the shapes of the I-V characteristics vary substantially. (c) 2005 Published by Elsevier B.V.

引用

页码：230 / 233

页数：4

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