TY  - JOUR
AU  - Jafarpisheh, S.
AU  - Cummings, A. W.
AU  - Watanabe, K.
AU  - Taniguchi, T.
AU  - Beschoten, B.
AU  - Stampfer, Christoph
TI  - Proximity-induced spin-orbit coupling in graphene/ Bi 1.5 Sb 0.5 Te 1.7 Se 1.3 heterostructures
JO  - Physical review / B
VL  - 98
IS  - 24
SN  - 2469-9950
CY  - Woodbury, NY
PB  - Inst.
M1  - FZJ-2020-02421
SP  - 241402
PY  - 2018
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000452003600005
DO  - DOI:10.1103/PhysRevB.98.241402
UR  - https://juser.fz-juelich.de/record/877720
ER  -