228 citations · 1.7k across the 25 of their papers we have counts for
13 papers · 1 filter
Field-tunable Weyl points and large anomalous Hall effects in degenerate magnetic semiconductor EuMgBi
M. Kondo, M. Ochi, R. Kurihara +10
Magnets, with topologically-nontrivial Dirac/Weyl points, have recently attracted significant attention owing to the unconventional physical properties, such as large anomalous Hal…
Tunable spin-valley coupling in layered polar Dirac metals
Masaki Kondo, Masayuki Ochi, Tatsuhiro Kojima +9
In non-centrosymmetric metals, spin-orbit coupling (SOC) induces momentum-dependent spin polarization at the Fermi surfaces. This is exemplified by the valley-contrasting spin pola…
Bulk quantum Hall effect of spin-valley-coupled Dirac fermions in a polar antiferromagnet BaMnSb
H. Sakai, H. Fujimura, S. Sakuragi +16
Unconventional features of relativistic Dirac/Weyl quasi-particles in topological materials are most evidently manifested in the 2D quantum Hall effect (QHE), whose variety is furt…
Quantitative evaluation of Dirac physics in PbTe
Kazuto Akiba, Atsushi Miyake, Hideaki Sakai +7
The magnetic field dependence of electronic transport, magnetic, and elastic properties in single crystals of PbTe were investigated in high magnetic fields up to 55 T. The magneto…
Evolution of the 2D antiferromagnetism with temperature and magnetic field in multiferroic BaCoGeO
V. Hutanu, A. P. Sazonov, M. Meven +11
We report on spherical neutron polarimetry and unpolarized neutron diffraction in zero magnetic field as well as flipping ratio and static magnetization measurements in high magnet…
Giant magneto-optical response in non-magnetic semiconductor BiTeI driven by bulk Rashba spin splitting
L. Demkó, G. A. H. Schober, V. Kocsis +7
We study the magneto-optical (MO) response of polar semiconductor BiTeI with giant bulk Rashba spin splitting at various carrier densities. Despite being non-magnetic, the material…
Spin-stretching modes in anisotropic magnets: spin-wave excitations in the multiferroic Ba2CoGe2O7
K. Penc, J. Romhányi, T. Rõõm +10
We studied spin excitations of the multiferroic Ba2CoGe2O7 in high magnetic fields up to 33 T. In the electron spin resonance and far infrared absorption spectra we found several s…
Chirality of Matter Shows Up via Spin Excitations
Sandor Bordacs, Istvan Kezsmarki, David Szaller +10
Right- and left-handed circularly polarized light interact differently with electronic charges in chiral materials. This asymmetry generates the natural circular dichroism and gyro…
Magnetic-field induced competition of two multiferroic orders in a triangular-lattice helimagnet MnI2
T. Kurumaji, S. Seki, S. Ishiwata +4
Magnetic and dielectric properties with varying magnitude and direction of magnetic field H have been investigated for a triangular lattice helimagnet MnI2. The in-plane electric p…
Cupric chloride CuCl2 as an S=1/2 chain multiferroic
S. Seki, T. Kurumaji, S. Ishiwata +6
Magnetoelectric properties were investigated for an S=1/2 chain antiferromagnet CuCl2, which turns out to be the first example of non-chalcogen based spiral-spin induced multiferro…
Ferroelectricity induced by spin-dependent metal-ligand hybridization in BaCoGeO
H. Murakawa, Y. Onose, S. Miyahara +2
We have investigated the variation of induced ferroelectric polarization under magnetic field with various directions and magnitudes in a staggered antiferromagnet BaCoGeO$…
Dynamics of Multiferroic Domain Wall in Spin-Cycloidal Ferroelectric DyMnO
F. Kagawa, M. Mochizuki, Y. Onose +4
We report the dielectric dispersion of the giant magnetocapacitance (GMC) in multiferroic DyMnO over a wide frequency range. The GMC is found to be attributable not to the so…
Orbital Properties of Sr3Ru2O7 and Related Ruthenates Probed by 17O-NMR
K. Kitagawa, K. Ishida, R. S. Perry +3
We report a site-separated O-NMR study of the layered perovskite ruthenate SrRuO, which exhibits nearly two-dimensional transport properties and itinerant metama…