6 papers
Nonlinear spin-motive force driven by mixed-space quantum geometry
Tomonari Meguro, Hiroaki Ishizuka, Kentaro Nomura
Spin-motive force, i.e., the electric current induced by magnetization dynamics, is theoretically studied beyond the Thouless-pump paradigm. In contrast to the linear-response regi…
Magnetic Weyl semimetals: Interplay of band topology and magnetism
Akihiro Ozawa, Yasufumi Araki, Koji Kobayashi +1
We review recent theoretical and experimental developments in magnetic Weyl semimetals, focusing on the electromagnetic responses emerging from the interplay of their electronic ba…
Fermi arcs around magnetic domain walls in a compensated ferrimagnetic Weyl semimetal TiMnAl
Yuta Furusho, Tomonari Meguro, Kentaro Nomura
Fermi arcs are one of the characteristic features of Weyl semimetals, appearing as surface states that connect Weyl points with opposite chiralities. It has also been suggested tha…
Topological Spin-Orbit Torque in Ferrimagnetic Weyl Semimetal
Tomonari Meguro, Akihiro Ozawa, Koji Kobayashi +2
The spin-orbit torque (SOT) in a compensated ferrimagnetic Weyl semimetal, , is studied by the linear response theory. We elucidate that the SOT driven by a…
Collective excitations in magnetic topological insulators and axion dark matter search
Koji Ishiwata, Kentaro Nomura
We investigate collective excitations in magnetic topological insulators (TIs) and their impact on axion detection. In the three-dimensional TI model with the Hubbard term, the eff…
Chiral gauge field in fully-spin polarized Weyl semimetal with magnetic domain walls
Akihiro Ozawa, Yasufumi Araki, Kentaro Nomura
Modulation of magnetization in magnetic Weyl semimetals leads to the shift of Weyl points in momentum space, which effectively serves as the chirality-dependent gauge field for the…