制备和表征具有显著增强临界磁场的扫描隧道显微超导 Nb 尖端
超导电性
2009-11-10 v1
摘要
我们报告了一种制备用于扫描隧道显微镜超导 Nb 尖端的简单方法，这些尖端可实现原子分辨率。经由超导体-绝缘体-金属(NIS)和超导体-绝缘体-超导体(SIS)光谱推断，其显示清晰的超导能隙 1.5 meV，临界温度 Tc=9.2±0.3 K，与 Bulk Nb 样品值相符。我们系统地发现部分尖端的临界磁场显著增大，至约 1 T，远高于 Bulk Nb 的临界磁场 0.21 T。这种增强可归因于尖端顶端的尺度效应。
引用
@article{arxiv.cond-mat/0412095,
title = {Fabrication and characterization of scanning tunneling microscopy superconducting Nb tips having highly enhanced critical fields},
author = {A. Kohen and Y. Noat and T. Proslier and E. Lacaze and M. Aprili and W. Sacks and D. Roditchev},
journal= {arXiv preprint arXiv:cond-mat/0412095},
year = {2009}
}
备注
to appear in Physica C