84 citations · 469 across the 20 of their papers we have counts for
17 papers · 1 filter
Unconventional gate voltage dependence of the charge conductance caused by spin-splitting Fermi surface by Rashba-type spin-orbit coupling
D. Oshima, K. Taguchi, Y. Tanaka
We calculate the gate voltage (Vg) dependence of charge conductance in a normal metal (NM)/two dimensional electron gas (2DEG) junction, where Rashba spin-orbit coupling and ferrom…
Electromagnetic effects induced by time-dependent axion field
Katsuhisa Taguchi, Tatsushi Imaeda, Tetsuya Hajiri +4
We studied the dynamics of the so-called -term, which exists in topological materials and is related to a hypothetical field predicted by Peccei-Quinn in particle physics, in a…
Spin-Dependent Conductance in a Junction with Dresselhaus Spin-Orbit Coupling
Daisuke Oshima, Katsuhisa Taguchi, Yukio Tanaka
We studied spin-dependent conductance in a normal metal (NM)/NM junction with Dresselhaus spin-orbit coupling (DSOC) and magnetization. As a reference, we also studied the spin-dep…
Spin-orbit coupling induced valley Hall effects in transition-metal dichalcogenides
Benjamin T. Zhou, Katsuhisa Taguchi, Yuki Kawaguchi +2
In transition-metal dichalcogenides, electrons in the K-valleys can experience both Ising and Rashba spin-orbit couplings. In this work, we show that the coexistence of Ising and R…
Tunneling conductance in two-dimensional junctions between a normal metal and a ferromagnetic Rashba metal
Daisuke Oshima, Katsuhisa Taguchi, Yukio Tanaka
We have studied charge transport in ferromagnetic Rashba metal (FRM), where both Rashba type spin-orbit coupling (RSOC) and exchange coupling coexist. It has nontrivial metallic st…
Valley Edelstein Effect in Monolayer Transition Metal Dichalcogenides
Katsuhisa Taguchi, Benjamin T. Zhou, Yuki Kawaguchi +2
In this work, we predict the emergence of the valley Edelstein Effect (VEE), which is an electric-field-induced spin polarization effect, in gated monolayer transition metal dichal…
Photovoltaic anomalous Hall effect in line-node semimetals
Katsuhisa Taguchi, Dong-Hui Xu, Ai Yamakage +1
We theoretically study the circularly polarized light-induced Floquet state in line-node semimetals with time-reversal symmetry and inversion symmetry. It is found that the Floquet…
Photovoltaic Chiral Magnetic Effect
Katsuhisa Taguchi, Tatsushi Imaeda, Masatoshi Sato +1
We theoretically predict a generation of a current in Weyl semimetals by applying circularly polarized light. The electric field of the light can drive an effective magnetic field…
Spin and charge transport induced by a twisted light beam on a surface of a topological insulator
Kunitaka Shintani, Katsuhisa Taguchi, Yukio Tanaka +1
We theoretically study spin and charge transport induced by a twisted light beam irradiated on a disordered surface of a doped three dimensional topological insulator (TI). We find…
Spin-charge transport driven by magnetization dynamics on disordered surface of doped topological insulators
Katsuhisa Taguchi, Kunitaka Shintani, Yukio Tanaka
We theoretically study the spin and charge generation along with the electron transport on a disordered surface of a doped three-dimensional topological insulator/magnetic insulato…
Axial Current driven by Magnetization Dynamics in Weyl Semimetals
Katsuhisa Taguchi, Yukio Tanaka
We theoretically study the axial current (defined as the difference between the charge current with opposite chirality) in doped Weyl semimetal using a Green's function…
Giant magnetoresistance in the junction of two ferromagnets on the surface of diffusive topological insulators
Katsuhisa Taguchi, Takehito Yokoyama, Yukio Tanaka
We reveal the giant magnetoresistance induced by the spin-polarized current in the ferromagnet (F_1)/topological insulator (TI)/ferromagnet (F_2) junction, where two ferromagnets a…
Active electromagnetic metamaterial based on spin torque oscillators
Gen Tatara, Hiroaki T. Ueda, Katsuhisa Taguchi +3
We propose theoretically an active material for electromagnetic radiation with frequency of GHz by use of spin-torque oscillators. The origin of the amplification is the energy sup…
Ultrafast magnetic vortex core switching driven by topological inverse Faraday effect
Katsuhisa Taguchi, Jun-ichiro Ohe, Gen Tatara
We present a theoretical discovery of an unconventional mechanism of inverse Faraday effect (IFE) which acts selectively on topological magnetic structures. The effect, topological…
Monopoles in ferromagnetic metals
Gen Tatara, Akihito Takeuchi, Noriyuki Nakabayashi +1
The aim of this short review is to give an introduction to monopoles and to present theoretical derivation of two particular monopoles in ferromagnetic metals, a hedgehog monopole…
Spin relaxation torque in metallic ferromagnets
Noriyuki Nakabayashi, Akihito Takeuchi, Kazuhiro Hosono +2
Spin relaxation torque in uniform metallic ferromagnets with the spin-orbit interaction arising from random impurities is calculated microscopically. is shown…
The anomalous Hall conductivity due to the vector spin chirality
Katsuhisa Taguchi, Gen Tatara
We study theoretically the anomalous Hall effect due to the vector spin chirality carried by the local spins in the - model. We will show that the vector spin chirality indee…