scholarly journals Proximity Effect in BSCCO Intrinsic Josephson Junctions Contacted with a Normal Metal Layer

2012 ◽  
Vol 36 ◽  
pp. 205-210
Author(s):  
Minoru Suzuki ◽  
Masayuki Koizumi ◽  
Masayuki Ohmaki ◽  
Itsuhiro Kakeya ◽  
Yu. M. Shukrinov
Author(s):  
Norman O. Birge

The proximity effect between a superconducting material and a non-superconducting normal metal can extend over distances of the order of micrometres at sufficiently low temperatures. If the normal metal is replaced by a ferromagnetic material, the spatial extent of the proximity effect drops precipitously due to the exchange splitting between the majority and minority spin bands in the ferromagnet. In 2001, several theorists predicted that spin-triplet pair correlations could be induced in proximity systems involving multiple ferromagnetic materials (or multiple domains in one material) with non-collinear magnetizations. Such spin-triplet pair correlations should extend deep into the ferromagnet, producing a long-range proximity effect. In this paper, we review our experimental work in this area, which has focused primarily on Josephson junctions containing strong ferromagnetic materials. We show that Josephson junctions containing particular combinations of strong ferromagnetic materials can carry spin-triplet supercurrent over distances of at least several tens of nanometres, whereas spin-singlet supercurrent in similar samples decays over a length scale of about 1 nm. We also mention important work by other groups; however, this article is not intended to be a review of the whole field. This article is part of the theme issue ‘Andreev bound states’.


2006 ◽  
Vol 20 (2) ◽  
pp. S28-S33 ◽  
Author(s):  
A Yurgens ◽  
L X You ◽  
M Torstensson ◽  
D Winkler

2008 ◽  
Vol 129 ◽  
pp. 012033 ◽  
Author(s):  
Minoru Suzuki ◽  
Masayuki Ohmaki ◽  
Ryota Takemura ◽  
Kenji Hamada ◽  
Takao Watanabe ◽  
...  

2009 ◽  
Vol 19 (3) ◽  
pp. 886-890 ◽  
Author(s):  
K.E. Gray ◽  
L. Ozyuzer ◽  
A.E. Koshelev ◽  
C. Kurter ◽  
K. Kadowaki ◽  
...  

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