Square and rhombic lattices of magnetic skyrmions in a centrosymmetric binary compound

R Takagi, N Matsuyama, V Ukleev, L Yu… - Nature …, 2022 - nature.com
Magnetic skyrmions are topologically stable swirling spin textures with particle-like
character, and have been intensively studied as a candidate of high-density information bit …

[HTML][HTML] Stabilization mechanisms of magnetic skyrmion crystal and multiple-Q states based on momentum-resolved spin interactions

S Hayami, R Yambe - Materials Today Quantum, 2024 - Elsevier
Multiple-Q states as represented by a magnetic skyrmion crystal and hedgehog crystal have
been extensively studied in recent years owing to their unconventional physical properties …

Spin order and fluctuations in the and topological antiferromagnets: A study

XY Zhu, H Zhang, DJ Gawryluk, ZX Zhen, BC Yu, SL Ju… - Physical Review B, 2022 - APS
EuAl 4 and EuGa 4 are two candidate materials for studying the interplay between
correlated-electron phenomena, topological spin textures, and topologically nontrivial …

Helicity locking of a square skyrmion crystal in a centrosymmetric lattice system without vertical mirror symmetry

S Hayami, R Yambe - Physical Review B, 2022 - APS
We theoretically investigate the stability of a square skyrmion crystal (SkX) in a
centrosymmetric tetragonal lattice structure with the emphasis on the role of the magnetic …

Charge-Density-Wave Order and Multiple Magnetic Transitions in Divalent Europium Compound EuAl4

K Kaneko, T Kawasaki, A Nakamura… - Journal of the Physical …, 2021 - journals.jps.jp
Multiple transition phenomena in divalent Eu compound EuAl4 with the tetragonal structure
were investigated via the single-crystal time-of-flight neutron Laue technique. At 30.0 K …

Multiple skyrmion crystal phases by itinerant frustration in centrosymmetric tetragonal magnets

S Hayami - Journal of the Physical Society of Japan, 2022 - journals.jps.jp
A skyrmion crystal (SkX) expressed as a multiple number of spiral modulations manifests
itself not only in its peculiar magnetic texture but also in nontrivial transport properties …

Field-Direction Sensitive Skyrmion Crystals in Cubic Chiral Systems: Implication to 4f-Electron Compound EuPtSi

S Hayami, R Yambe - Journal of the Physical Society of Japan, 2021 - journals.jps.jp
We theoretically study the stability of magnetic skyrmion crystals (SkXs) in chiral cubic
antiferromagnets with the EuPtSi hosting unconventional nanometric SkXs in mind. By …

Rectangular and square skyrmion crystals on a centrosymmetric square lattice with easy-axis anisotropy

S Hayami - Physical Review B, 2022 - APS
We report our theoretical results on the emergence of a rectangular-and square-shaped
magnetic skyrmion crystals on a centrosymmetric square lattice with magnetic anisotropy. By …

Effective spin model in momentum space: Toward a systematic understanding of multiple- instability by momentum-resolved anisotropic exchange interactions

R Yambe, S Hayami - Physical Review B, 2022 - APS
Multiple-Q magnetic states, such as a skyrmion crystal, become a source of unusual
transport phenomena and dynamics. Recent theoretical and experimental studies clarified …

Phonon softening and atomic modulations in

AN Korshunov, AS Sukhanov, S Gebel, MS Pavlovskii… - Physical Review B, 2024 - APS
EuAl 4 is a rare-earth intermetallic in which competing itinerant and/or indirect exchange
mechanisms give rise to a complex magnetic phase diagram, including a centrosymmetric …