Spatially correlated microstructure and superconductivity in polycrystalline boron-doped diamond

被引：24
|
作者：
Dahlem, F. [1 ,2 ]
Achatz, P. [1 ,2 ]
Williams, O. A. [3 ]
Araujo, D. [4 ,5 ]
Bustarret, E. [1 ,2 ]
Courtois, H. [1 ,2 ]
机构：
[1] CNRS, Inst Neel, F-38042 Grenoble, France
[2] Univ Grenoble 1, F-38042 Grenoble, France
[3] IMEC, Div IMOMEC, B-3590 Diepenbeek, Belgium
[4] Univ Cadiz, Dept Ciencia Mat, Puerto Real 11510, Spain
[5] Univ Cadiz, IMyQI, Puerto Real 11510, Spain
来源：
PHYSICAL REVIEW B | 2010年 / 82卷 / 03期
关键词：
VERY-LOW TEMPERATURE; LOCAL SPECTROSCOPY; FILMS;
D O I：
10.1103/PhysRevB.82.033306
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Scanning tunneling spectroscopies are performed below 100 mK on polycrystalline boron-doped diamond films characterized by transmission electron microscopy and transport measurements. We demonstrate a strong correlation between the local superconductivity strength and the granular structure of the films. The study of the spectral shape, amplitude, and temperature dependence of the superconductivity gap enables us to differentiate intrinsically superconducting grains that follow the BCS model, from grains showing a different behavior involving the superconducting proximity effect.
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页数：4
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