429 citations · 1.5k across the 23 of their papers we have counts for
25 papers
Charge-Transfer Electronic Structure of NiX (X = S, Se)
Atsushi Hariki, Takaki Okauchi, Daisuke Takegami +8
We investigate the electronic structures of NiS and NiSe using density functional theory combined with dynamical mean-field theory (DFT+DMFT). A realistic electronic struct…
Large Photoelasticity in Topological Antiferromagnet MnSn Studied by Coherent Acoustic Phonon
Yuchen Wang, Takuya Matsuda, Yuta Murotani +5
We investigate the role of ultrafast strain on the electronic and optical responses in topological antiferromagnet MnSn thin films using near-infrared femtosecond pump-probe sp…
Crossover between intrinsic and temperature-assisted regimes in spin-orbit torque switching of antiferromagnetic order
Takumi Matsuo, Tomoya Higo, Daisuke Nishio-Hamane +7
Intensive studies have been made on antiferromagnets as candidate materials for next generation memory bits due to their ultrafast dynamics reaching picosecond time scales. Recent…
High-resolution magnetic imaging by mapping the locally induced anomalous Nernst effect using atomic force microscopy
Nico Budai, Hironari Isshiki, Ryota Uesugi +4
We report a magnetic imaging method using atomic force microscopy to measure the locally induced anomalous Nernst effect. The tip contact creates a local temperature gradient on th…
Observation of cluster magnetic octupole domains in the antiferromagnetic Weyl semimetal Mn3Sn nanowire
Hironari Isshiki, Nico Budai, Ayuko Kobayashi +4
The antiferromagnetic Weyl semimetal Mn3Sn has attracted wide attention due to their vast anomalous transverse transport properties despite barely net magnetization. So far, the ma…
Observation of chiral domain walls in an octupole-ordered antiferromagnet
Moeta Tsukamoto, Zhewen Xu, Tomoya Higo +10
Spin chirality in antiferromagnets offers new opportunities for spintronics. The kagome antiferromagnet Mn3Sn is a paradigmatic material in which the antiferromagnetic order parame…
Exfoliation and Optical Properties of S=1 Triangular Lattice Antiferromagnet NiGaS
Jazzmin Victorin, Aleksandar Razpopov, Tomoya Higo +5
Two-dimensional (2D) van der Waals (vdW) materials have been an exciting area of research ever since scientists first isolated a single layer of graphene. Single layer magnetic mat…
Emergence of high-mobility carriers in topological kagome bad metal MnSn by intense photoexcitation
Takuya Matsuda, Tomoya Higo, Kenta Kuroda +13
Kagome-lattice materials offer novel playgrounds of exploring topologically nontrivial states of electrons under influence of many-body interactions. A noncollinear kagome antiferr…
Bond Ordering and Molecular Spin-Orbital Fluctuations in the Cluster Mott Insulator GaTaSe
Tsung-Han Yang, S. Kawamoto, Tomoya Higo +8
For materials where spin-orbit coupling is competitive with electronic correlations, the spatially anisotropic spin-orbital wavefunctions can stabilize degenerate states that lead…
Ultrafast Dynamics of Intrinsic Anomalous Hall Effect in the Topological Antiferromagnet Mn3Sn
Takuya Matsuda, Tomoya Higo, Takashi Koretsune +8
We investigate ultrafast dynamics of the anomalous Hall effect (AHE) in the topological antiferromagnet Mn3Sn with sub-100 fs time resolution. Optical pulse excitations largely ele…
Piezomagnetic switching of anomalous Hall effect in an antiferromagnet at room temperature
M. Ikhlas, S. Dasgupta, F. Theuss +6
Piezomagnetism couples strain linearly to magnetic order producing magnetization. Thus, unlike magnetostriction, it enables bidirectional control of a net magnetic moment. If this…
Observation of spontaneous x-ray magnetic circular dichroism in a chiral antiferromagnet
Shoya Sakamoto, Tomoya Higo, Masanobu Shiga +3
X-ray magnetic circular dichroism (XMCD) signals are usually absent in antiferromagnets. In this letter, we report the observation of spontaneous XMCD spectra originating from the…
Giant effective damping of octupole oscillation in an antiferromagnetic Weyl semimetal
Shinji Miwa, Satoshi Iihama, Takuya Nomoto +8
A magnetic Weyl semimetal is a recent focus of extensive research as it may exhibit large and robust transport phenomena associated with topologically protected Weyl points in mome…
Electrical Manipulation of a Topological Antiferromagnetic State
Hanshen Tsai, Tomoya Higo, Kouta Kondou +9
Electrical manipulation of emergent phenomena due to nontrivial band topology is a key to realize next-generation technology using topological protection. A Weyl semimetal is a thr…
Impact of the lattice on magnetic properties and possible spin nematicity in the S=1 triangular antiferromagnet NiGaS
Michael E. Valentine, Tomoya Higo, Yusuke Nambu +5
NiGaS is a triangular lattice S=1 system with strong two-dimensionality of the lattice, actively discussed as a candidate to host spin-nematic order brought about by strong…
Room-Temperature Terahertz Anomalous Hall Effect in Weyl Antiferromagnet MnSn Thin Films
Takuya Matsuda, Natsuki Kanda, Tomoya Higo +3
Antiferromagnetic spin motion at terahertz (THz) frequencies attracts growing interests for fast spintronics, however their smaller responses to external field inhibit device appli…
Terahertz conductivity of the magnetic Weyl semimetal MnSn films
Bing Cheng, Youcheng Wang, D. Barbalas +3
MnSn is a non-collinear antiferromagnet which displays a large anomalous Hall effect at room temperature. It is believed that the principal contribution to its anomalous Hall…
Evaluation of spin diffusion length and spin Hall angle of antiferromagnetic Weyl semimetal MnSn
P. K. Muduli, T. Higo, T. Nishikawa +6
Antiferromagnetic Weyl semimetal MnSn has shown to generate strong intrinsic anomalous Hall effect (AHE) at room temperature, due to large momentum-space Berry curvature from t…
Anomalous Hall Effect in Thin Film of the Weyl Antiferromagnet MnSn
Tomoya Higo, Danru Qu, Yufan Li +3
The Weyl antiferromagnet MnSn has recently attracted significant attention as it exhibits various useful functions such as large anomalous Hall effect that are normally absent…
Phase Boundary Exchange Coupling in the Mixed Magnetic Phase Regime of a Pd-doped FeRh Epilayer
J. R. Massey, K. Matsumoto, M. Strungaru +8
Spin-wave resonance measurements were performed in the mixed magnetic phase regime of a Pd-doped FeRh epilayer that appears as the first-order ferromagnetic-antiferromagnetic phase…
Large magneto-optical Kerr effect and imaging of magnetic octupole domains in an antiferromagnetic metal
Tomoya Higo, Huiyuan Man, Daniel B. Gopman +14
When a polarized light beam is incident upon the surface of a magnetic material, the reflected light undergoes a polarization rotation. This magneto-optical Kerr effect (MOKE) has…
Large Spontaneous Hall Effects in Chiral Topological Magnets
S. Nakatsuji, T. Higo, M. Ikhlas +2
As novel topological phases in correlated electron systems, we have found two examples of non-ferromagnetic states that exhibit a large anomalous Hall effect. One is the chiral spi…
Frustrated magnetism in the Heisenberg pyrochlore antiferromagnets Yb ( = Cd, Mg, = S, Se)
Tomoya Higo, Kensuke Iritani, Mario Halim +5
Our polycrystalline sample study on the Yb-based chalcogenide spinels Yb ( Cd, Mg, S, Se) has revealed frustrated magnetism due to the antiferromagnetically…
Spin dynamics and spin freezing in the triangular lattice antiferromagnets FeGa2S4 and NiGa2S4
Songrui Zhao, P. Dalmas de R/'eotier, A. Yaouanc +6
Magnetic susceptibility and muon spin relaxation (muSR) experiments have been carried out on the quasi-2D triangular-lattice spin S = 2 antiferromagnet FeGa2S4. The muSR data indic…