Chemistry Reference
In-Depth Information
Fig. 1. A microscopic image of a graphene spin valve (top), and a non-local measurement
scheme (middle) and a local measurement scheme (bottom) for spin injection into SLG
and MLG.
scheme for excluding spurious signals (see Figs. 1(b) and (c)). One can
detect a non-local output voltage which is induced by position dependence
of electrochemical potential of the generated spin current in the graphene.
Here, spins are injected at ferromagnet(FM)/graphene of the top layer of the
graphene in the injector side (between Co1 and Au1) as an electric current
and accumulated spins diffuse from Co1 to Co2 and Au2 (the detector side).
Hence, an output voltage induced by the generated spin current is
determined by an amount of accumulated spins, namely, it is strongly
affected by the interface spin polarization at Co1/graphene. In a non-local
scheme, an electric current
I
is injected from Co1 into GTF and extracted at
Au1. The voltage difference is measured between Co2 and Au2. The
