721 citations · 1.8k across the 25 of their papers we have counts for
24 papers
Exciton-magnon splitting in van der Waals antiferromagnet MnPS unveiled by second-harmonic generation
Ziqian Wang, Xiao-Xiao Zhang, Yuki Shiomi +4
Ultrafast and coherent generation of magnons is of great significance for high-speed antiferromagnetic spintronics. One possible route is by exciton-magnon pairwise optical excitat…
Giant Magnetochiral Anisotropy in Weyl-semimetal WTe2 Induced by Diverging Berry Curvature
Tomoyuki Yokouchi, Yuya Ikeda, Takahiro Morimoto +1
The concept of Berry curvature is essential for various transport phenomena. However, an effect of the Berry curvature on magnetochiral anisotropy, i.e. nonreciprocal magneto-trans…
Pattern recognition with neuromorphic computing using magnetic-field induced dynamics of skyrmions
Tomoyuki Yokouchi, Satoshi Sugimoto, Bivas Rana +5
Nonlinear phenomena in physical systems can be used for brain-inspired computing with low energy consumption. Response from the dynamics of a topological spin structure called skyr…
Modulation of Spin Seebeck Effect by Hydrogenation
K. Ogata, T. Kikkawa, E. Saitoh +1
We demonstrate the modulation of spin Seebeck effect (SSE) by hydrogenation in Pd/YIG bilayers. In the presence of 3% hydrogen gas, SSE voltage decreases by more than 50% from the…
Triplon current generation in solids
Yao Chen, Masahiro Sato, Yifei Tang +6
A triplon refers to a fictitious particle that carries angular momentum corresponding to the elementary excitation in a broad class of quantum dimerized spin systems. Such…
Observation of nuclear-spin Seebeck effect
T. Kikkawa, D. Reitz, H. Ito +10
Thermoelectric effects have been applied to power generators and temperature sensors that convert waste heat into electricity. The effects, however, have been limited to electrons…
Modulation of Dirac electrons in epitaxial Bi2Se3 ultrathin films on van-der-Waals ferromagnet Cr2Si2Te6
Takemi Kato, Katsuaki Sugawara, Naohiro Ito +7
We investigated the Dirac-cone state and its modulation when an ultrathin film of topological insulator Bi2Se3 was epitaxially grown on a van-der-Waals ferromagnet Cr2Si2Te6 (CST)…
Magnon Pairs and Spin-Nematic Correlation in the Spin-Seebeck Effect
Daichi Hirobe, Masahiro Sato, Masato Hagihala +3
Investigating exotic magnetic materials with spintronic techniques is effective at advancing magnetism as well as spintronics. In this work, we report unusual field-induced suppres…
Spin Seebeck effect in the layered ferromagnetic insulators CrSiTe and CrGeTe
Naohiro Ito, Takashi Kikkawa, Joseph Barker +3
We have studied the longitudinal spin Seebeck effect (LSSE) in the layered ferromagnetic insulators CrSiTe and CrGeTe covered by Pt films in the measurement configuration w…
Observation of Magnetopiezoelectric Effect in Antiferromagnetic Metal EuMnBi2
Y. Shiomi, H. Watanabe, H. Masuda +3
We have experimentally studied a magnetopiezoelectric effect predicted recently for magnetic metals with low crystal symmetries. In EuMnBi2 with antiferromagnetic Mn moments at 77…
Nonreciprocal spin Seebeck effect in antiferromagnets
Rina Takashima, Yuki Shiomi, Yukitoshi Motome
We theoretically propose a nonreciprocal spin Seebeck effect, i.e., nonreciprocal spin transport generated by a temperature gradient, in antiferromagnetic insulators with broken in…
Spin-current coherence peak in superconductor/magnet junctions
Maki Umeda, Yuki Shiomi, Takashi Kikkawa +4
Coherence peak effects in a superconductor induced by a thermal spin current are reported. We measured inverse spin Hall effects induced by spin injection from a ferrimagnetic insu…
Spin Seebeck effect in a polar antiferromagnet -CuVO
Y. Shiomi, R. Takashima, D. Okuyama +5
We have studied the longitudinal spin Seebeck effect in a polar antiferromagnet -CuVO in contact with a Pt film. Below the antiferromagnetic transition tempera…
Fabrication and magnetic control of Y3Fe5O12 cantilevers
Yong-Jun Seo, Kazuya Harii, Ryo Takahashi +6
We have fabricated ferrite cantilevers in which their vibrational properties can be controlled by external magnetic fields. Submicron-scale cantilever structures were made from Y3F…
Magnetic thermal conductivity far above the Néel temperatures in the Kitaev-magnet candidate -RuCl
Daichi Hirobe, Masahiro Sato, Yuki Shiomi +2
We have investigated the longitudinal thermal conductivity of -RuCl, the magnetic state of which is considered to be proximate to a Kitaev honeycomb model, along with the…
Observation of spin current in quantum spin liquid
Daichi Hirobe, Masahiro Sato, Takayuki Kawamata +6
Spin liquid is a state of electron spins in which quantum fluctuation breaks magnetic ordering while maintaining spin correlation. It has been a central topic in magnetism because…
Universal scaling for the spin-electricity conversion on surface states of topological insulators
K. T. Yamamoto, Y. Shiomi, Kouji Segawa +2
We have investigated spin-electricity conversion on surface states of bulk-insulating topological insulator (TI) materials using a spin pumping technique. The sample structure is N…
Critical suppression of spin Seebeck effect by magnetic fields
Takashi Kikkawa, Ken-ichi Uchida, Shunsuke Daimon +3
The longitudinal spin Seebeck effect (LSSE) in Pt/YFeO (YIG) junction systems has been investigated at various magnetic fields and temperatures. We found that the LS…
Spectral shape deformation in inverse spin Hall voltage in Y3Fe5O12|Pt bilayers at high microwave power levels
J. Lustikova, Y. Shiomi, Y. Handa +1
We report on the deformation of microwave absorption spectra and of the inverse spin Hall voltage signals in thin film bilayers of yttrium iron garnet (YIG) and platinum at high mi…
Generation of Spin Currents in the Skyrmion Phase of a Helimagnetic Insulator
Daichi Hirobe, Yuki Shiomi, Yuhki Shimada +2
We report spin-current generation related with skyrmion dynamics resonantly excited by a microwave in a helimagnetic insulator . A Pt layer was fabricated on $…
Paramagnetic spin pumping
Y. Shiomi, E. Saitoh
We have demonstrated spin pumping from a paramagnetic state of an insulator La2NiMnO6 into a Pt film. Single-crystalline films of La2NiMnO6 which exhibit a ferromagnetic order at T…
Enhancement of Spin Pumping in Trilayer Film
Daichi Hirobe, Ryo Iguchi, Kazuya Ando +2
We study spin pumping in a trilayer film by means of the inverse spin Hall effect (ISHE). When the ferromagnets are not excited…
Bulk topological insulators as inborn spintronics detectors
Y. Shiomi, K. Nomura, Y. Kajiwara +5
Detection and manipulation of electrons' spins are key prerequisites for spin-based electronics or spintronics. This is usually achieved by contacting ferromagnets with metals or s…
Observation of the Magnon Hall Effect
Y. Onose, T. Ideue, H. Katsura +3
The Hall effect usually occurs when the Lorentz force acts on a charge current in a conductor in the presence of perpendicular magnetic field. On the other hand, neutral quasi-part…