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Efficient spin injection and giant magnetoresistance in Fe/MoS2/Fe junctions

Kapildeb Dolui, Awadhesh Narayan, Ivan Rungger, and Stefano Sanvito
Phys. Rev. B 90, 041401(R) – Published 2 July 2014

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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  • Received 14 April 2014
  • Revised 21 June 2014

DOI:https://doi.org/10.1103/PhysRevB.90.041401

©2014 American Physical Society

Authors & Affiliations

Kapildeb Dolui, Awadhesh Narayan*, Ivan Rungger, and Stefano Sanvito

  • School of Physics, AMBER and CRANN, Trinity College, Dublin 2, Ireland

  • *narayaa@tcd.ie

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Issue

Vol. 90, Iss. 4 — 15 July 2014

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