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arXiv · 1404.3517

Efficient spin injection and giant magnetoresistance in Fe/MoS$_2$/Fe junctions

Kapildeb Dolui·Awadhesh Narayan·Ivan Rungger·Stefano Sanvito
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Abstract

We demonstrate giant magnetoresistance in Fe/MoS$_2$/Fe junctions by means of \textit{ab-initio} transport calculations. We show that junctions incorporating either a mono- or a bi-layer of MoS$_2$ are metallic and that Fe acts as an efficient spin injector into MoS$_2$ 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 $\sim$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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Kapildeb Dolui, Awadhesh Narayan, Ivan Rungger, Stefano Sanvito. 2014-04-14. Efficient spin injection and giant magnetoresistance in Fe/MoS$_2$/Fe junctions. https://doi.org/10.1103/physrevb.90.041401

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