9 citations · 24 across the 9 of their papers we have counts for
10 papers
Effect of interaction range on the phase diagram of magnetic hedgehog lattices
Midori Yamada, Kotaro Shimizu, Shun Okumura +2
Topological spin textures have attracted considerable attention through their emergent electromagnetic properties, including the topological Hall effect and the topological Nernst…
Electric-field-induced magnetic toroidal moment and nonlinear magnetoelectric effect in antiferromagnetic olivines
Yasuyuki Kato, Takeshi Hayashida, Koei Matsumoto +2
Beyond conventional electric and magnetic monopoles, electric and magnetic toroidal monopoles, which are rank-0 multipoles distinguished by opposite parities under spatial inversio…
Topological transition induced by selective random defects on a honeycomb lattice
Sogen Ikegami, Kiyu Fukui, Shun Okumura +2
We investigate how the spectral and topological properties of electron systems evolve on a lattice that interpolates between the honeycomb and its 1/6-depleted structures through t…
Three-dimensional Topological Superstructure of Magnetic Hopfions Threaded by Meron Strings in Easy-plane Magnets
Shoya Kasai, Kotaro Shimizu, Shun Okumura +2
Topological spin textures exhibit a hierarchical nature. For instance, magnetic skyrmions, which possess a particle-like nature, can aggregate to form superstructures such as skyrm…
Soliton penetration from edges in a monoaxial chiral magnet
Kotaro Shimizu, Shun Okumura, Yasuyuki Kato +1
The magnetic solitons such as chiral solitons, magnetic skyrmions, and magnetic hopfions, exhibiting particlelike nature widely emerge in magnets depending on spatial dimension. As…
Current-induced motion of nanoscale magnetic torons over the wide range of the Hall angle
Kotaro Shimizu, Shun Okumura, Yasuyuki Kato +1
Current-driven dynamics of spin textures plays a pivotal role in potential applications for electronic devices. While two-dimensional magnetic skyrmions with topologically nontrivi…
Topological phase diagram of the Haldane model on a Bishamon-kikko--honeycomb lattice
Sogen Ikegami, Kiyu Fukui, Shun Okumura +2
Topological flat bands have gained extensive interest as a platform for exploring the interplay between nontrivial band topology and correlation effects. In recent studies, strongl…
Topological transitions by magnetization rotation in kagome monolayers of ferromagnetic Weyl semimetal Co-based shandite
Kazuki Nakazawa, Yasuyuki Kato, Yukitoshi Motome
Co-based shandite CoSnS is a ferromagnet hosting Weyl fermions in the layered Co kagome structure. The band topology as well as the magnetism is predicted to vary drast…
Magnetic field effects on the Kitaev model coupled to environment
Kiyu Fukui, Yasuyuki Kato, Yukitoshi Motome
Open quantum systems display unusual phenomena not seen in closed systems, such as new topological phases and unconventional phase transitions. An interesting example was studied f…
Spin Seebeck Effect as a Probe for Majorana Fermions in Kitaev Spin Liquids
Yasuyuki Kato, Joji Nasu, Masahiro Sato +3
Quantum entanglement in strongly correlated electron systems often leads to exotic elementary excitations. Quantum spin liquids (QSLs) provide a paradigmatic example, where the ele…