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

Handle URI:
http://hdl.handle.net/10754/598119
Title:
Efficient spin injection and giant magnetoresistance in Fe / MoS 2 / Fe junctions
Authors:
Dolui, Kapildeb; Narayan, Awadhesh; Rungger, Ivan; Sanvito, Stefano
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. © 2014 American Physical Society.
Citation:
Dolui K, Narayan A, Rungger I, Sanvito S (2014) Efficient spin injection and giant magnetoresistance in Fe / MoS 2 / Fe junctions . Physical Review B 90. Available: http://dx.doi.org/10.1103/PhysRevB.90.041401.
Publisher:
American Physical Society (APS)
Journal:
Physical Review B
Issue Date:
2-Jul-2014
DOI:
10.1103/PhysRevB.90.041401
Type:
Article
ISSN:
1098-0121; 1550-235X
Sponsors:
This work is supported by Science Foundation of Ireland (AMBER center) and by the Irish Research Council (A.N.). I.R. acknowledges financial support from the King Abdullah University of Science and Technology (ACRAB project). We thank Trinity Centre for High Performance Computing (TCHPC) and Irish Centre for High-End Computing (ICHEC) for providing the computational resources. K.D., A.N., and I.R. contributed equally to this work.
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Full metadata record

DC FieldValue Language
dc.contributor.authorDolui, Kapildeben
dc.contributor.authorNarayan, Awadheshen
dc.contributor.authorRungger, Ivanen
dc.contributor.authorSanvito, Stefanoen
dc.date.accessioned2016-02-25T13:13:02Zen
dc.date.available2016-02-25T13:13:02Zen
dc.date.issued2014-07-02en
dc.identifier.citationDolui K, Narayan A, Rungger I, Sanvito S (2014) Efficient spin injection and giant magnetoresistance in Fe / MoS 2 / Fe junctions . Physical Review B 90. Available: http://dx.doi.org/10.1103/PhysRevB.90.041401.en
dc.identifier.issn1098-0121en
dc.identifier.issn1550-235Xen
dc.identifier.doi10.1103/PhysRevB.90.041401en
dc.identifier.urihttp://hdl.handle.net/10754/598119en
dc.description.abstractWe 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.en
dc.description.sponsorshipThis work is supported by Science Foundation of Ireland (AMBER center) and by the Irish Research Council (A.N.). I.R. acknowledges financial support from the King Abdullah University of Science and Technology (ACRAB project). We thank Trinity Centre for High Performance Computing (TCHPC) and Irish Centre for High-End Computing (ICHEC) for providing the computational resources. K.D., A.N., and I.R. contributed equally to this work.en
dc.publisherAmerican Physical Society (APS)en
dc.titleEfficient spin injection and giant magnetoresistance in Fe / MoS 2 / Fe junctionsen
dc.typeArticleen
dc.identifier.journalPhysical Review Ben
dc.contributor.institutionTrinity College Dublin, Dublin, Irelanden
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