Efficient spin injection and giant magnetoresistance in Fe / MoS 2 / Fe junctions

Kapildeb Dolui, Awadhesh Narayan, Ivan Rungger, Stefano Sanvito

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We demonstrate giant magnetoresistance in Fe/MoS2/Fe junctions by means of ab initio transport calculations. We show that junctions incorporating either a monolayer or a bilayer of MoS2 are metallic and that Fe acts as an efficient spin injector into MoS2 with an efficiency of about 45%. This is the result of the strong coupling between the Fe and S atoms at the interface. For junctions of greater thickness, a maximum magnetoresistance of ∼300% is obtained, which remains robust with the applied bias as long as transport is in the tunneling limit. A general recipe for improving the magnetoresistance in spin valves incorporating layered transition metal dichalcogenides is proposed. © 2014 American Physical Society.
Original languageEnglish (US)
JournalPhysical Review B
Issue number4
StatePublished - Jul 2 2014
Externally publishedYes


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