Gate-controlled supercurrent reversal in MoS sub(2)-based Josephson junctions

Motivated by recent experiments revealing superconductivity in MoS sub(2), we investigate the Josephson effect in the monolayer MoS sub(2) in the presence of an exchange splitting. We show that the supercurrent reversal known as 0-[pi] transition can occur by varying the doping via gate voltages. Th...

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Published inEurophysics letters Vol. 108; no. 3; pp. 37001 - p1-37002-p5
Main Authors RAMESHTI, BABAK ZARE, Moghaddam, Ali G, Zareyan, Malek
Format Journal Article
LanguageEnglish
Published 01.11.2014
Subjects
Density
Doping
Electric potential
Ferromagnetism
Molybdenum disulfide
Oscillations
Superconductor junctions
Superconductors
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Summary:Motivated by recent experiments revealing superconductivity in MoS sub(2), we investigate the Josephson effect in the monolayer MoS sub(2) in the presence of an exchange splitting. We show that the supercurrent reversal known as 0-[pi] transition can occur by varying the doping via gate voltages. This is in contrast to common superconductor/ferromagnet/superconductor junctions in which successive 0-[pi] transitions take place with the variation of junction length or temperature. In fact for the case of MoS sub(2) we find that both the amplitude and the period of oscillations show a dependence on the doping which explains the predicted doping-induced supercurrent reversal. These effects comes from the dependence of density and Fermi velocity on the doping strength beside the intrinsic spin-splitting in the valence band which originates from spin-orbit interaction.
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ISSN:0295-5075
1286-4854
DOI:10.1209/0295-5075/108/37002