Topological spin crystals by itinerant frustration

S Hayami, Y Motome - Journal of Physics: Condensed Matter, 2021 - iopscience.iop.org
Spin textures with nontrivial topology, such as vortices and skyrmions, have attracted
attention as a source of unconventional magnetic, transport, and optical phenomena …

Topological aspects of antiferromagnets

V Bonbien, F Zhuo, A Salimath, O Ly… - Journal of Physics D …, 2021 - iopscience.iop.org
The long fascination that antiferromagnetic materials has exerted on the scientific community
over about a century has been entirely renewed recently with the discovery of several …

Spontaneous topological Hall effect induced by non-coplanar antiferromagnetic order in intercalated van der Waals materials

H Takagi, R Takagi, S Minami, T Nomoto, K Ohishi… - Nature Physics, 2023 - nature.com
In ferromagnets, an electric current generally induces a transverse Hall voltage in proportion
to the internal magnetization. This effect is frequently used for the electrical readout of the …

Anisotropic anomalous Hall effect in triangular itinerant ferromagnet

Y Wang, C Xian, J Wang, B Liu, L Ling, L Zhang, L Cao… - Physical Review B, 2017 - APS
Magnetic frustrated materials are of great interest for their novel spin-dependent transport
properties. We report an anisotropic anomalous Hall effect in the triangular itinerant …

Spontaneous skyrmionic lattice from anisotropic symmetric exchange in a Ni-halide monolayer

D Amoroso, P Barone, S Picozzi - Nature communications, 2020 - nature.com
Topological spin structures, such as magnetic skyrmions, hold great promises for data
storage applications, thanks to their inherent stability. In most cases, skyrmions are …

Zero-field skyrmions with a high topological number in itinerant magnets

R Ozawa, S Hayami, Y Motome - Physical Review Letters, 2017 - APS
Magnetic Skyrmions are swirling spin textures with topologically protected noncoplanarity.
Recently, Skyrmions with the topological number of unity have been extensively studied in …

Effective bilinear-biquadratic model for noncoplanar ordering in itinerant magnets

S Hayami, R Ozawa, Y Motome - Physical Review B, 2017 - APS
Noncollinear and noncoplanar magnetic textures including Skyrmions and vortices act as
emergent electromagnetic fields and give rise to novel electronic and transport properties …

Complex charge density waves at Van Hove singularity on hexagonal lattices: Haldane-model phase diagram and potential realization in the kagome metals AV 3 Sb …

YP Lin, RM Nandkishore - Physical Review B, 2021 - APS
We investigate how the real and imaginary charge density waves interplay at the Van Hove
singularity on the hexagonal lattices. A phenomenological analysis indicates the formation …

Frustration and chiral orderings in correlated electron systems

CD Batista, SZ Lin, S Hayami… - Reports on Progress in …, 2016 - iopscience.iop.org
The term frustration refers to lattice systems whose ground state cannot simultaneously
satisfy all the interactions. Frustration is an important property of correlated electron systems …

Bubble and skyrmion crystals in frustrated magnets with easy-axis anisotropy

S Hayami, SZ Lin, CD Batista - Physical Review B, 2016 - APS
We clarify the conditions for the emergence of multiple-Q structures out of lattice and easy-
axis spin anisotropy in frustrated magnets. By considering magnets whose exchange …