35 citations · 186 across the 25 of their papers we have counts for
25 papers
Symmetry-protected difference between spin Hall and anomalous Hall effects of a periodically driven multiorbital metal
Naoya Arakawa, Kenji Yonemitsu
Nonequilibrium quantum states can be controlled via the driving field in periodically driven systems. Such control, which is called Floquet engineering, has opened various phenomen…
Magnon drag induced by magnon-magnon interactions characteristic of noncollinear magnets
Naoya Arakawa
A noncollinear magnet consists of the magnetic moments forming a noncollinear spin structure. Because of this structure, the Hamiltonian of magnons acquires the cubic terms. Althou…
Interband magnon drag in ferrimagnetic insulators
Naoya Arakawa
We propose a new drag phenomenon, an interband magnon drag, and report on interaction effects and multiband effects in magnon transport of ferrimagnetic insulators. We study a spin…
Polarization-dependent magnetic properties of periodically driven -RuCl
Naoya Arakawa, Kenji Yonemitsu
We study magnetic properties of a periodically driven Mott insulator with strong spin-orbit coupling and show some properties characteristic of linearly polarized light. We conside…
Floquet engineering of Mott insulators with strong spin-orbit coupling
Naoya Arakawa, Kenji Yonemitsu
We propose a method for controlling the exchange interactions of Mott insulators with strong spin-orbit coupling. We consider a multiorbital system with strong spin-orbit coupling…
Effects of magnon-magnon interactions in a noncollinear magnet induced by combination of a symmetric and an antisymmetric exchange interaction
Naoya Arakawa
We study magnon-magnon interactions and their effects in a spiral magnet induced by combination of an antiferromagnetic Heisenberg interaction and a Dzyaloshinsky-Moriya interactio…
Mechanism for a Chemical Potential of Nonequilibrium Magnons in Parametric Parallel Pumping
Naoya Arakawa
We demonstrate how a magnon chemical potential is generated in parametric parallel pumping. We study how a time-periodic magnetic field of this pumping affects magnon properties of…
Controlling stability of Bose-Einstein condensation of interacting magnons in an antiferromagnet by an external magnetic field
Naoya Arakawa
We propose a mechanism for destabilizing or stabilizing Bose-Einstein condensation (BEC) of interacting magnons in an antiferromagnet. We study how the interaction between magnons…
Stabilizing Mechanism for Bose-Einstein Condensation of Interacting Magnons in Ferrimagnets and Ferromagnets
Naoya Arakawa
We propose a stabilizing mechanism for the Bose-Einstein condensation (BEC) of interacting magnons in ferrimagnets and ferromagnets. By studying the effects of the magnon-magnon in…
Inplane anisotropy of longitudinal thermal conductivities and weak localization of magnons in a disordered spiral magnet
Naoya Arakawa, Jun-ichiro Ohe
We demonstrate the inplane anisotropy of longitudinal thermal conductivities and the weak localization of magnons in a disordered screw-type spiral magnet on a square lattice. We c…
Negative magneto-thermal-resistance in a disordered two-dimensional antiferromagnet
Naoya Arakawa, Jun-ichiro Ohe
We demonstrate that a weak external magnetic field can induce negative magneto-thermal-resistance for magnons in a disordered two-dimensional antiferromagnet. We study the main eff…
Weak localization of magnons in a disordered two-dimensional antiferromagnet
Naoya Arakawa, Jun-ichiro Ohe
We propose the weak localization of magnons in a disordered two-dimensional antiferromagnet. We derive the longitudinal thermal conductivity for magnons of a disordered He…
Magnon Dispersion and Specific Heat of Chiral Magnets on the Pyrochlore Lattice
Naoya Arakawa
Chiral magnets are magnetically ordered insulators having spin scalar chirality, and magnons of chiral magnets have been poorly understood. We study the magnon dispersion and speci…
Tunneling between chiral magnets: Spin current generation without external fields
Naoya Arakawa
Magnons can generate a spin current, and the standard generating mechanism requires at least one external field. Since this mechanism is often applied to a multilayer system includ…
Controlling effective dimensionality and competition between spin liquid and chiral orders by new multiorbital effects in pyrochlore oxides
Naoya Arakawa
In frustrated systems, some or many states are competed due to frustration of exchange interactions, and this competition often results in exotic states, such as spin liquid and ch…
Microscopic theory of Dzyaloshinsky-Moriya interaction in pyrochlore oxides with spin-orbit coupling
Naoya Arakawa
Pyrochlore oxides show several fascinating phenomena, such as the formation of heavy fermions and the thermal Hall effect. Although a key to understanding some phenomena may be the…
Vector chirality for effective total momentum in a nonfrustrated Mott insulator: Effects of strong spin-orbit coupling and broken inversion symmetry
Naoya Arakawa
I propose the emergence of the spin-orbital-coupled vector chirality in a non-frustrated Mott insulator with the strong spin-orbit coupling due to -plane's inversion-symmetry (…
Fermi surface versus Fermi sea contributions to intrinsic anomalous and spin Hall effects of multiorbital metals in the presence of Coulomb interaction and spin-Coulomb drag
Naoya Arakawa
Anomalous Hall effect (AHE) and spin Hall effect (SHE) are fundamental phenomena, and their potential for application is great. However, we understand the interaction effects unsat…
Microscopic theory on charge transports of a correlated multiorbital system
Naoya Arakawa
Current vertex correction (CVC), the back-flow-like correction to the current, comes from conservation laws, and the CVC due to electron correlation contains information about many…
Many-body effects on the resistivity of a multiorbital system beyond Landau's Fermi-liquid theory
Naoya Arakawa
I review many-body effects on the resistivity of a multiorbital system beyond Landau's Fermi-liquid (FL) theory. Landau's FL theory succeeds in describing electronic properties of…
Controlling spin Hall effect by using a band anticrossing and nonmagnetic impurity scattering
Tomonari Mizoguchi, Naoya Arakawa
The spin Hall effect (SHE) is one of the promising phenomena to utilize a spin current as spintronics devices, and the theoretical understanding of its microscopic mechanism is ess…
Orbital-cooperative spin fluctuation and orbital-dependent transport in ruthenates
Naoya Arakawa
Unusual transport properties deviating from the Fermi liquid are observed in ruthenates near a magnetic quantum-critical point (QCP). To understand the electronic properties of the…
Competition between spin fluctuations in CaSrRuO around
Naoya Arakawa, Masao Ogata
We study the static susceptibilities for charge and spin sectors in paramagnetic states for CaSrRuO in within random phase approximation on t…
Origin of the Heavy Fermion Behavior in Ca_{2-x}Sr_{x}RuO_{4}: Roles of Coulomb Interaction and the Rotation of RuO_{6} octahedra
Naoya Arakawa, Masao Ogata
We study the electronic states for Ca_{2-x}Sr_{x}RuO_{4} in within the Gutzwiller approximation (GA) on the basis of the three-orbital Hubbard model for the Ru t…