684 citations · 3.1k across the 32 of their papers we have counts for
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AC Current-Driven Magnetization Switching and Nonlinear Hall Rectification in a Magnetic Topological Insulator
Yuto Kiyonaga, Masataka Mogi, Ryutaro Yoshimi +7
Spin-orbit torque arising from the spin-orbit-coupled surface states of topological insulators enables current-induced control of magnetization with high efficiency. Here, alternat…
This took us a Weyl: synthesis of a semimetallic Weyl ferromagnet with point Fermi surface
Ilya Belopolski, Ryota Watanabe, Yuki Sato +19
Quantum materials governed by emergent topological fermions have become a cornerstone of physics. Dirac fermions in graphene form the basis for moiré quantum matter, and Dirac ferm…
Gate-electric-field and magnetic-field control of versatile topological phases in a semi-magnetic topological insulator
Ryota Watanabe, Ryutaro Yoshimi, Kei S. Takahashi +4
Surface states of a topological insulator demonstrate interesting quantum phenomena, such as the quantum anomalous Hall (QAH) effect and the quantum magnetoelectric effect. Fermi e…
Experimental signature of parity anomaly in semi-magnetic topological insulator
M. Mogi, Y. Okamura, M. Kawamura +9
A three-dimensional topological insulator features a two-dimensional surface state consisting of a single linearly-dispersive Dirac cone. Under broken time-reversal symmetry, the s…
Current scaling of the topological quantum phase transition between a quantum anomalous Hall insulator and a trivial insulator
Minoru Kawamura, Masataka Mogi, Ryutaro Yoshimi +5
We report a current scaling study of a quantum phase transition between a quantum anomalous Hall insulator and a trivial insulator on the surface of a heterostructure film of magne…
Quantum anomalous Hall effect driven by magnetic proximity coupling in all-telluride based heterostructure
Ryota Watanabe, Ryutaro Yoshimi, Minoru Kawamura +7
The quantum anomalous Hall effect (QAHE) is an exotic quantum phenomenon originating from dissipation-less chiral channels at the sample edge. While the QAHE has been observed in m…
Large Anomalous Hall Effect in Topological Insulators with Proximitized Ferromagnetic Insulators
Masataka Mogi, Taro Nakajima, Victor Ukleev +9
We report a proximity-driven large anomalous Hall effect in all-telluride heterostructures consisting of ferromagnetic insulator Cr2Ge2Te6 and topological insulator (Bi,Sb)2Te3. De…
Topological quantum phase transition in magnetic topological insulator upon magnetization rotation
Minoru Kawamura, Masataka Mogi, Ryutaro Yoshimi +5
We report a continuous phase transition between quantum-anomalous-Hall and trivial-insulator phases in a magnetic topological insulator upon magnetization rotation. The Hall conduc…
Tailoring tricolor structure of magnetic topological insulator for robust axion insulator
M. Mogi, M. Kawamura, A. Tsukazaki +4
Exploration of novel electromagnetic phenomena is a subject of great interest in topological quantum materials. One of the unprecedented effects to be experimentally verified is to…
Quantized chiral edge conduction on reconfigurable domain walls of a magnetic topological insulator
K. Yasuda, M. Mogi, R. Yoshimi +5
The electronic orders in magnetic and dielectric materials form the domains with different signs of order parameters. The control of configuration and motion of the domain walls (D…
Current-driven instability of quantum anomalous Hall effect in ferromagnetic topological insulators
Minoru Kawamura, Ryutaro Yoshimi, Atsushi Tsukazaki +3
Instability of quantum anomalous Hall (QAH) effect has been studied as function of electric current and temperature in ferromagnetic topological insulator thin films. We find that…
Observation of topological Faraday and Kerr rotations in quantum anomalous Hall state by terahertz magneto-optics
K. N. Okada, Y. Takahashi, M. Mogi +6
Electrodynamic responses from three-dimensional (3D) topological insulators (TIs) are characterized by the universal magnetoelectric term constituent of the Lagrangian f…
Magnetic modulation doping in topological insulators toward higher-temperature quantum anomalous Hall effect
M. Mogi, R. Yoshimi, A. Tsukazaki +5
Quantum anomalous Hall effect (QAHE), which generates dissipation-less edge current without external magnetic field, is observed in magnetic-ion doped topological insulators (TIs),…
Quantum Hall States Stabilized in Semi-magnetic Bilayers of Topological Insulators
R. Yoshimi, K. Yasuda, A. Tsukazaki +4
By breaking the time-reversal-symmetry in three-dimensional topological insulators with introduction of spontaneous magnetization or application of magnetic field, the surface stat…