199 citations · 1.7k across the 61 of their papers we have counts for
61 papers
Skew scattering by magnetic monopoles and anomalous Hall effect in spin-orbit coupled systems
Jun Mochida, Hiroaki Ishizuka
Magnetic textures like skyrmions and domain walls coupled to itinerant electrons give rise to rich transport phenomena such as anomalous Hall effect and nonreciprocal current. An i…
Experimental signatures of versatile Weyl semimetal in pyrochlore iridate with spin-ice like magnetic orders
Kentaro Ueda, Hiroaki Ishizuka, Markus Kriener +6
We report experimental signatures of topological transitions among the Weyl semimetal states of pyrochlore Pr2Ir2O7, where the Kondo coupling between the Ir topological electrons a…
Spin motive force by the momentum-space Berry phase in magnetic Weyl semimetals
Akira Harada, Hiroaki Ishizuka
We show that the magnetic precession of ferromagnetic moments in a noncentrosymmetric magnetic Weyl semimetal induces an electric current through a mechanism analogous to the adiab…
Wide-range resistivity and umklapp scattering in moiré graphene
Hiroaki Ishizuka, Leonid Levitov
We argue that the unusually strong electron-electron interactions in the narrow bands in moiré superlattices originate from compact Wannier orbitals. Enhanced overlaps of electroni…
Large photogalvanic spin current by magnetic resonance in bilayer Cr trihalides
Hiroaki Ishizuka, Masahiro Sato
Magnetic materials show rich optical responses related to the magnetic order. These phenomena reflect the nature of their excitations, providing a powerful probe for the magnetic s…
Quantum critical behavior in magic-angle twisted bilayer graphene
Alexandre Jaoui, Ipsita Das, Giorgio Di Battista +7
The flat bands of magic-angle twisted bilayer graphene (MATBG) host strongly-correlated electronic phases such as correlated insulators, superconductors and a strange-metal state.…
Enhanced Electrical Magnetochiral Effect by Spin-hedgehog Lattice Structural Transition
Aki Kitaori, Naoya Kanazawa, Hiroaki Ishizuka +3
Nonreciprocal resistance, depending on both directions of current () and magnetic-field () or magnetization (), is generally expected to emerge in a chiral conductor, and…
Nonlinear orbital response across topological phase transition in centrosymmetric materials
Margarita Davydova, Maksym Serbyn, Hiroaki Ishizuka
Nonlinear optical responses are often used as a probe for studying electronic properties of materials. For topological materials, studies so far focused on the photogalvanic electr…
Giant anomalous Hall effect from spin-chirality scattering in a chiral magnet
Yukako Fujishiro, Naoya Kanazawa, Ryosuke Kurihara +10
The electrical Hall effect can be significantly enhanced through the interplay of the conduction electrons with magnetism, which is known as the anomalous Hall effect (AHE). Wherea…
Tunable electron-phonon interactions in long-period superlattices
Hiroaki Ishizuka, Ali Fahimniya, Francisco Guinea +1
The efficiency of optical emitters can be dramatically enhanced by reducing the effective mode volume (the Purcell effect). Here we predict an analogous enhancement for electron-ph…
Spin-current version of solar cells in non-centrosymmetric magnetic insulators
Masahiro Sato, Hiroaki Ishizuka
Photovoltaic effect, e.g., solar cells, converts light into DC electric current. This phenomenon takes place in various setups such as in noncentrosymmetric crystals and semiconduc…
Butterfly-shaped magnetoresistance in triangular-lattice antiferromagnet AgCrO
Hiroki Taniguchi, Mori Watanabe, Masashi Tokuda +8
Spintronic devices using antiferromagnets (AFMs) are promising candidates for future applications. Recently, many interesting physical properties have been reported with AFM-based…
Theory of shift current in Anderson insulator
Hiroaki Ishizuka, Naoto Nagaosa
Shift current is a photovoltaic current in bulk noncentrosymmetric insulator. Studies on shift current have so far focused on the extended Bloch waves, such as in semiconductors an…
Real space Berry curvature of itinerant electron systems with spin-orbit interaction
Shang-Shun Zhang, Hiroaki Ishizuka, Hao Zhang +2
By considering an extended double-exchange model with spin-orbit coupling (SOC), we derive a general form of the Berry phase that electrons pick up when moving around a closed…
Anomalous electrical magnetochiral effect by chiral spin fluctuation
Hiroaki Ishizuka, Naoto Nagaosa
The non-collinear spin configurations cause many nontrivial phenomena related to the Berry phase. They are described by the vector spin chirality …
Theory for shift current of bosons: Photogalvanic spin current in ferrimagnetic and antiferromagnetic insulators
Hiroaki Ishizuka, Masahiro Sato
We theoretically study the optical generation of dc spin current (i.e., a spin-current solar cell) in ordered antiferromagnetic and ferrimagnetic insulators, motivated by a recent…
Theory of giant skew scattering by spin cluster
Hiroaki Ishizuka, Naoto Nagaosa
Skew scattering of electrons induced by a spin cluster is studied theoretically focusing on metals with localized magnetic moments. The scattering probability is calculated by a no…
Spin-current diode with a monoaxial chiral magnet
Shun Okumura, Hiroaki Ishizuka, Yasuyuki Kato +2
Monoaxial chiral magnets exhibit a chiral conical magnetic state in a magnetic field parallel to the chiral axis. The conical spins carry the potential for nonreciprocal transport…
Magnetically Switchable Light-Matter Interaction in the Two-Dimensional Magnet CrI3
Yang Zhang, Tobias Holder, Hiroaki Ishizuka +4
Coupling different physical properties is a fascinating subject of physics. Already well-known are the multiferroics which show properties of ferroelectrics and magnets. But ferroe…
Berry phase of phonons and thermal Hall effect in nonmagnetic insulators
Takuma Saito, Kou Misaki, Hiroaki Ishizuka +1
A mechanism for phonon Hall effect (PHE) in non-magnetic insulators under an external magnetic field is theoretically studied. PHE is known in (para)magnetic compounds, where the m…
Scaling Theory of Quantum Ratchet
Keita Hamamoto, Takamori Park, Hiroaki Ishizuka +1
The asymmetric responses of the system between the external force of right and left directions are called "nonreciprocal". There are many examples of nonreciprocal responses such a…
Colossal enhancement of spin-chirality-related Hall effect by thermal fluctuation
Yasuyuki Kato, Hiroaki Ishizuka
The effect of thermal fluctuation on the spin-chirality-induced anomalous Hall effect in itinerant magnets is theoretically studied. Considering a triangular-lattice model as an ex…
Rectification of Spin Current in Inversion-Asymmetric Magnets with Linearly-Polarized Electromagnetic Waves
Hiroaki Ishizuka, Masahiro Sato
We theoretically propose a method of rectifying spin current with a linearly-polarized electromagnetic wave in inversion-asymmetric magnetic insulators. To demonstrate the proposal…
Robustness of anomaly-related magnetoresistance in doped Weyl semimetals
Hiroaki Ishizuka, Naoto Nagaosa
Weyl semimetal with Weyl fermions at Fermi energy is one of the topological materials, and is a condensed-matter realization of the relativistic fermions. However, there are severa…