8 papers
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…
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…
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…