Individually, both graphene and PbxSn1-xTe (PST) are widely investigated for spintronic applications due to graphene’s high carrier mobility and PST’s topologically protected surface states. Here, we combine monolayer graphene with PST and demonstrate a hybrid system with enhanced properties relative to the constituent materials. Through a combination of standard magnetotransport and non-local spin measurements, we demonstrate the system contains two distinct spin transport channels: a low temperature channel with significant Rashba spin-orbit coupling and a high-temperature conventional conducting channel with efficient spin transport up to at least 500 K.
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