Spin Pumping into Anisotropic Dirac Electrons

Abstract

We study spin pumping into an anisotropic Dirac electron system induced by microwave irradiation to an adjacent ferromagnetic insulator theoretically. We formulate the Gilbert damping enhancement due to the spin current flowing into the Dirac electron system using second-order perturbation with respect to the interfacial exchange coupling. As an illustration, we consider the anisotropic Dirac system realized in bismuth to show that the Gilbert damping varies according to the magnetization direction in the ferromagnetic insulator. Our results indicate that this setup can provide helpful information on the anisotropy of the Dirac electron system.

arXiv comment10 pages, 6 figures

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Cited by in corpus (7)

• Theory of inverse Rashba-Edelstein effect induced by spin pumping into a two-dimensional electron gas
• Twisted bilayer graphene reveals its flat bands under spin pumping
• Spin Pumping into Carbon Nanotubes
• Spin Pumping into two-dimensional systems
• Spin pumping into quantum spin chains
• Microscopic theory of Rashba-Edelstein magnetoresistance
• Theory of spin pumping and inverse Rashba-Edelstein effect in a two-dimensional electron gas