Tunable spin-charge conversion through topological phase transitions in zigzag nanoribbons
KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
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AbstractWe study spin-orbit torques and charge pumping in magnetic quasi-one-dimensional zigzag nanoribbons with a hexagonal lattice, in the presence of large intrinsic spin-orbit coupling. Such a system experiences a topological phase transition from a trivial band insulator to a quantum spin Hall insulator by tuning of either the magnetization direction or the intrinsic spin-orbit coupling. We find that the spin-charge conversion efficiency (i.e., spin-orbit torque and charge pumping) is dramatically enhanced at the topological transition, displaying a substantial angular anisotropy.
CitationTunable spin-charge conversion through topological phase transitions in zigzag nanoribbons 2016, 93 (23) Physical Review B
SponsorsThe research reported in this publication was supported by King Abdullah University of Science and Technology (KAUST).
PublisherAmerican Physical Society (APS)
JournalPhysical Review B