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

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.

6 pages, 4 figures

References in corpus (18)

• Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
• Topological Field Theory of Time-Reversal Invariant Insulators
• Valley-Polarized Metals and Quantum Anomalous Hall Effect in Silicene
• Quantum Anomalous Hall Effect in Graphene from Rashba and Exchange Effects
• Proximity-induced ferromagnetism in graphene revealed by anomalous Hall effect
• Spin-pumping into surface states of topological insulator α-Sn, spin to charge conversion at room temperature
• Magnetic Insulator-Induced Proximity Effects in Graphene: Spin Filtering and Exchange Splitting Gaps
• Electric-field control of spin-orbit torque in a magnetically doped topological insulator
• Mott Physics and Topological Phase Transition in Correlated Dirac Fermions
• Integration of the Ferromagnetic Insulator EuO onto Graphene
• Intraband and interband spin-orbit torques in non-centrosymmetric ferromagnets
• Angular dependence of spin-orbit spin transfer torques
• Spin-Charge Locking and Tunneling into a Helical Metal
• Spin and Orbital Magnetic Response on the Surface of a Topological Insulator
• Current-induced spin polarization and spin-orbit torque in graphene
• Bulk Signatures of Pressure-Induced Band Inversion and Topological Phase Transitions in Pb${}_{1-x}$Sn${}_x$Se
• Valley-dependent spin-orbit torques in two dimensional hexagonal crystals
• Zigzag nanoribbons of two-dimensional hexagonal crystals: magnetic, topological and thermoelectric properties

Cited by in corpus (2)

• Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems
• Magnetoelectric torque and edge currents in spin-orbit coupled graphene nanoribbons