We demonstrate giant magnetoresistance in Fe/MoS2/Fe junctions by means of \textit{ab-initio} transport calculations. We show that junctions incorporating either a mono- or a bi-layer 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.
@article{arxiv.1404.3517,
title = {Efficient spin injection and giant magnetoresistance in Fe/MoS$_2$/Fe junctions},
author = {Kapildeb Dolui and Awadhesh Narayan and Ivan Rungger and Stefano Sanvito},
journal= {arXiv preprint arXiv:1404.3517},
year = {2014}
}