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This review summarizes the theoretical and experimental studies of spin transport
in graphene interfaced with transition metal dichalcogenides, and assesses its potential
for future spintronic applications.
Since its discovery, graphene has been a promising material for spintronics: its low
spin–orbit coupling, negligible hyperfine interaction, and high electron mobility
are obvious advantages for transporting spin information over long distances. However,
such outstanding transport properties also limit the capability to engineer active
spintronics, where strong spin–orbit coupling is crucial for creating and manipulating
spin currents. To this end, transition metal dichalcogenides, which have larger spin–orbit
coupling and good interface matching, appear to be highly complementary materials
for enhancing the spin-dependent features of graphene while maintaining its superior
charge transport properties. In this review, we present the theoretical framework
and the experiments performed to detect and characterize the spin–orbit coupling and
spin currents in graphene/transition metal dichalcogenide heterostructures. Specifically,
we will concentrate on recent measurements of Hanle precession, weak antilocalization
and the spin Hall effect, and provide a comprehensive theoretical description of the
interconnection between these phenomena.