Abstract:
:Spin-based devices offer non-volatile, scalable, low power and reprogrammable functionality for emerging device technologies. Here we fabricate nanoscale spintronic devices with ferromagnetic metal/single-layer graphene tunnel barriers used to generate spin accumulation and spin currents in a silicon nanowire transport channel. We report the first observation of spin precession via the Hanle effect in both local three-terminal and non-local spin-valve geometries, providing a direct measure of spin lifetimes and confirmation of spin accumulation and pure spin transport. The use of graphene as the tunnel barrier provides a low-resistance area product contact and clean magnetic switching characteristics, because it smoothly bridges the nanowire and minimizes complicated magnetic domains that otherwise compromise the magnetic behaviour. Utilizing intrinsic two-dimensional layers such as graphene or hexagonal boron nitride as tunnel contacts on nanowires offers many advantages over conventional materials deposited by vapour deposition, enabling a path to highly scaled electronic and spintronic devices.
journal_name
Nat Communjournal_title
Nature communicationsauthors
van 't Erve OM,Friedman AL,Li CH,Robinson JT,Connell J,Lauhon LJ,Jonker BTdoi
10.1038/ncomms8541subject
Has Abstractpub_date
2015-06-19 00:00:00pages
7541issn
2041-1723pii
ncomms8541journal_volume
6pub_type
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