Efficient spin injection and giant magnetoresistance in Fe/MoS2/Fe junctions
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2014Access:
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K. Dolui, A. Narayan, I. Rungger, and S. Sanvito, Efficient spin injection and giant magnetoresistance in Fe/MoS2/Fe junctions, Physical Review B, 90, 2014, 041401 (R)-Download Item:
PhysRevB.90.041401.pdf (PDF) 685.1Kb
Abstract:
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.
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Grant Number
Science Foundation Ireland (SFI)
12/RC/2278
Irish Research Council for Science and Engineering Technology (IRCSET)
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http://people.tcd.ie/sanvitoshttp://people.tcd.ie/narayaa
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Physical Review B90
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giant magnetoresistanceSubject (TCD):
Nanoscience & MaterialsDOI:
http://dx.doi.org/10.1103/PhysRevB.90.041401Licences: