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Anisotropic magnetotransport in Dirac-Weyl magnetic junctions
Yuya Ominato, Koji Kobayashi, Kentaro Nomura
We theoretically study the anisotropic magnetotransport in Dirac-Weyl magnetic junctions where a doped ferromagnetic Weyl semimetal is sandwiched between doped Dirac semimetals. We…
Laughlin's argument for the quantized thermal Hall effect
Ryota Nakai, Shinsei Ryu, Kentaro Nomura
We extend Laughlin's magnetic-flux-threading argument to the quantized thermal Hall effect. A proper analogue of Laughlin's adiabatic magnetic-flux threading process for the case o…
Microscopic derivation of magnon spin current in a topological insulator/ferromagnet heterostructure
Nobuyuki Okuma, Kentaro Nomura
We investigate a spin-electricity conversion effect in a topological insulator/ferromagnet heterostructure. In the spin-momentum-locked surface state, an electric current generates…
Spin pumping into two-dimensional electron systems
Takuya Inoue, Gerrit E. W. Bauer, Kentaro Nomura
We study the spin current injected by spin pumping into single layer graphene and the two-dimensional electron gas (2DEG) with ferromagnetic contacts using scattering theory. The s…
Universal charge and current on magnetic domain walls in Weyl semimetals
Yasufumi Araki, Akihide Yoshida, Kentaro Nomura
Domain walls in three-dimensional Weyl semimetals, formed by localized magnetic moments, are investigated. There appear bound states around the domain wall with the discrete spectr…
Voltage-driven magnetization switching and spin pumping in Weyl semimetals
Daichi Kurebayashi, Kentaro Nomura
We demonstrate electrical magnetization switching and spin pumping in magnetically doped Weyl semimetals. The Weyl semimetal is a new class of topological semimetals, known to have…