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arXiv · 1604.08782

Tunable spin-charge conversion through topological phase transitions in zigzag nanoribbons

Hang Li·Aurelien Manchon
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Abstract

We study spin-orbit torques and charge pumping in magnetic quasi-one dimensional zigzag nanoribbons with hexagonal lattice, in the presence of large intrinsic spin-orbit coupling. Such a system experiences topological phase transition from a trivial band insulator to a quantum spin Hall insulator either by tuning the magnetization direction or the intrinsic spin-orbit coupling. We find that spin-charge conversion efficiency (i.e. spin-orbit torque and charge pumping) is dramatically enhanced at the topological transition, displaying a substantial angular anisotropy.

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Hang Li, Aurelien Manchon. 2016-04-29. Tunable spin-charge conversion through topological phase transitions in zigzag nanoribbons. https://doi.org/10.1103/physrevb.93.235317

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