TITLE

Transport properties in FeSe0.5Te0.5 nanobridges

AUTHOR(S)
Wu, C. H.; Chang, W. C.; Jeng, J. T.; Wang, M. J.; Li, Y. S.; Chang, H. H.; Wu, M. K.
PUB. DATE
June 2013
SOURCE
Applied Physics Letters;6/3/2013, Vol. 102 Issue 22, p222602
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
FeSeTe nanobridges of different widths have been fabricated on MgO substrates using focused ion beams. These nanobridges exhibit the Josephson effects. The current-voltage curves of junctions with 248-564 nm wide follow the resistively and capacitatively shunted junction model. Shapiro steps under microwave radiation were clearly observed in these nanobridges. The products of the critical current and normal state resistance (IcRn) are remarkably high. The temperature dependence of IcRn product followed the Ambegaokar-Baratoff (A-B) relation. The value of energy gap of FeSeTe calculated from the A-B relation is 3.5kBTc. The nanobridge junctions have a strong potential for high frequency applications.
ACCESSION #
88041234

 

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