%0 Journal Article
%A Jafarpisheh, S.
%A Cummings, A. W.
%A Watanabe, K.
%A Taniguchi, T.
%A Beschoten, B.
%A Stampfer, Christoph
%T Proximity-induced spin-orbit coupling in graphene/ Bi 1.5 Sb 0.5 Te 1.7 Se 1.3 heterostructures
%J Physical review / B
%V 98
%N 24
%@ 2469-9950
%C Woodbury, NY
%I Inst.
%M FZJ-2020-02421
%P 241402
%D 2018
%X The weak intrinsic spin-orbit coupling in graphene can be greatly enhanced by proximity coupling. Here, we report on the proximity-induced spin-orbit coupling in graphene transferred by hexagonal boron nitride (hBN) onto the topological insulator Bi1.5Sb0.5Te1.7Se1.3 (BSTS) which was grown on a hBN substrate by vapor solid synthesis. Phase coherent transport measurements, revealing weak localization, allow us to extract the carrier density-dependent phase coherence length lϕ. While lϕ increases with increasing carrier density in the hBN/graphene/hBN reference sample, it decreases in graphene/BSTS due to the proximity coupling of BSTS to graphene. The latter behavior results from D'yakonov-Perel'-type spin scattering in graphene with a large proximity-induced spin-orbit coupling strength of at least 2.5 meV.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000452003600005
%R 10.1103/PhysRevB.98.241402
%U https://juser.fz-juelich.de/record/877720