Mechanism of antisymmetric spin polarization in centrosymmetric multiple-
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 magnets based on effective chiral bilinear and biquadratic spin cross products

Hayami, Satoru

doi:10.1103/physrevb.105.024413

Cited by 18 publications

(3 citation statements)

References 107 publications

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“…6(f) and 10(f). As different spin and scalar chirality configurations emerge depending on the resultant multiple-Q superposition, it is expected to obtain intriguing electronic states [128,129,130], excitation spectra [131,132,133,134,135,59], and nonreciprocal nonlinear transport [136,137,79] driven by the magnetic phase transition. The present study provides a platform to study such phenomena based on the microscopic model.…”

Section: Discussionmentioning

confidence: 99%

Skyrmion crystals in centrosymmetric triangular magnets under hexagonal and trigonal single-ion anisotropy

Hayami

2022

Preprint

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We theoretically report an instability toward a skyrmion crystal in centrosymmetric magnets under hexagonal and trigonal single-ion anisotropy. The results are obtained for a minimal spin model with a crystal-dependent singleion anisotropy on a triangular lattice by performing simulated annealing. By constructing magnetic phase diagrams in the presence of six different types of single-ion anisotropy while changing the amplitudes of external magnetic field and single-ion anisotropy in a systematic way, we find that the hexagonal and trigonal single-ion anisotropy becomes a source of the skyrmion crystal depending on the magnetic-field direction. We show that the skyrmion crystal is stabilized by the uniaxial-type or trigonal-type single-ion anisotropy under the out-of-plane magnetic field, while it is stabilized by the hexagonal-type inplane single-ion anisotropy under the inplane magnetic field. We also find various multiple-Q spin states depending on the types of the single-ion anisotropy.

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Section: Discussionmentioning

confidence: 99%

Skyrmion crystals in centrosymmetric triangular magnets under hexagonal and trigonal single-ion anisotropy

Hayami

2022

Preprint

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“…As these spin textures are stabilized by the anisotropic exchange interaction and the multiple-spin interaction, which have not been taken into account in the present model, further exotic spin textures that have never been reported in the single-layer system might be expected in nonsymmorphic systems with layer degrees of freedom. Such a discovery of new magnetic phases would be useful to explore intriguing electronic structures [23,74,91,[147][148][149][150][151][152][153] and quantum transport phenomena [27,154] characteristic of multiple-Q states in nonsymmorphic systems, which will be left for future study.…”

Section: Discussionmentioning

confidence: 99%

“…The microscopic key ingredients in these phenomena are often described by the vector and scalar spin chiralities, which correspond to the two-spin vector and three-spin scalar products, respectively [1][2][3]. For example, the vector chirality in noncollinear magnets leads to polar-vector-related physical phenomena without spatial inversion symmetry, such as the electric polarization [4][5][6], the spin current generation [7][8][9], the magnetoelectric effect [10][11][12][13][14][15][16][17][18][19][20], and the antisymmetric spin-split band structure [21][22][23]. On the other hand, the scalar chirality in noncoplanar magnets leads to axial-vector-related physical phenomena without time-reversal symmetry, such as the topological Hall effect [24][25][26][27][28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Skyrmion crystal with integer and fractional skyrmion numbers in a nonsymmorphic lattice structure with the screw axis

Hayami

2022

Phys. Rev. B

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The emergence of a magnetic skyrmion crystal in a nonsymmorphic lattice system with the screw symmetry is numerically investigated. By performing the simulated annealing for a layered spin model with the isotropic exchange interaction and the antisymmetric Dzyaloshinskii-Moriya interaction, and then constructing a lowtemperature phase diagram, we reveal that the skyrmion crystal is stabilized in both zero and nonzero fields even without the threefold rotational symmetry in the two-dimensional plane. We show that a competition between the ferromagnetic interlayer exchange interaction and the layer-and momentum-dependent anisotropic interactions is a source of the skyrmion crystals in the presence of the screw axis. Moreover, we find two types of layerdependent skyrmion crystals, which are characterized as a coexisting state of the skyrmion crystal and the spiral state, in the narrow field region. Our result provides a reference in the further search for skyrmion crystals in nonsymmorphic lattice systems.

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Skyrmion crystals in centrosymmetric triangular magnets under hexagonal and trigonal single-ion anisotropy

Hayami

2022

Journal of Magnetism and Magnetic Materials

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Mechanism of antisymmetric spin polarization in centrosymmetric multiple- Q magnets based on effective chiral bilinear and biquadratic spin cross products

Cited by 18 publications

References 107 publications

Skyrmion crystals in centrosymmetric triangular magnets under hexagonal and trigonal single-ion anisotropy

Skyrmion crystals in centrosymmetric triangular magnets under hexagonal and trigonal single-ion anisotropy

Skyrmion crystal with integer and fractional skyrmion numbers in a nonsymmorphic lattice structure with the screw axis

Skyrmion crystals in centrosymmetric triangular magnets under hexagonal and trigonal single-ion anisotropy

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