Proximity effect in a superconductor-metallofullerene-superconductor molecular junction -: art. no. 033414
Proximity effect in a superconductor-metallofullerene-superconductor molecular junction -: art. no. 033414
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DOI：
10.1103/physrevb.72.033414
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发表时间：
2005-07-01
影响因子：
3.7
通讯作者：
Bouchiat, H
中科院分区：
文献类型：
--
作者：
Kasumov, AY;Tsukagoshi, K;Bouchiat, H
我们报告低温运输测量通过超导悬浮电极之间的Gd金属富勒烯分子。通过高分辨率透射电子显微镜测定电极之间2 nm宽间隙中分子的存在和数量。我们发现，含有一个单一的金属富勒烯二聚体之间的超导电极的结显示邻近诱导的超导性的迹象。相比之下，没有邻近效应的发展，在路口包含一个更大的集群的金属富勒烯。这些结果可以通过考虑多次Andreev反射和Gd原子的自旋状态来理解。
We report low-temperature transport measurements through molecules of Gd metallofullerenes between superconducting suspended electrodes. The presence and number of molecules in the 2-nm-wide gap between electrodes was determined by high resolution transmission electron microscopy. We find that a junction containing a single metallofullerene dimer between superconducting electrodes displays signs of proximity-induced superconductivity. In contrast, no proximity effect develops in junctions containing a larger cluster of metallofullerenes. These results can be understood by taking into account multiple Andreev reflections, and the spin states of the Gd atoms.