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Energy gaps of ordered and disorderedA15 ’’phases’’ in Nb3Ge measured by tunneling

 

作者: J. M. Rowell,   P. H. Schmidt,  

 

期刊: Applied Physics Letters  (AIP Available online 1976)
卷期: Volume 29, issue 9  

页码: 622-625

 

ISSN:0003-6951

 

年代: 1976

 

DOI:10.1063/1.89166

 

出版商: AIP

 

数据来源: AIP

 

摘要:

In electron tunneling measurements into high‐Tcgetter‐sputtered Nb3Ge films, two energy gaps are clearly identified. The larger, 2&Dgr;=7.8 meV, we associate with well‐orderedA15 material. The smaller, 2&Dgr;∼1.0 meV, we suggest indicates the presence of very disordered material, because we cannot identify any known phase of the NbGe system with this low gap, and because a most interesting ’’phase’’ of Nb3Ge, with 2&Dgr;=0.86 meV andTc=3.06 K, was isolated by sputtering from the same target onto a cold (100−200 °C) substrate.

 

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