Spin–spin correlation length in a two-dimensional frustrated magnet and its relation to doping

Mikheyenkov, A. V.; Valiullin, V. E.; Shvartsberg, A. V.; Барабанов, А. Ф.

doi:10.1134/s1063776115090083

“…The main problem of investigation is that there are no studies of spin-wave spectra on multi-sublattice magnets with exchange competition. Two kinds of theoretical papers: geometrical frustration in triangular [7,8], honeycomb, or kagome lattice and exchange competition of next and other neighbors [9,10] on square lattice. Manganites under consideration are 3D magnets which have competing exchange interaction between nearest magnetic neighbors due to peculiar orbital ordering.…”

Section: Introductionmentioning

confidence: 99%

Spin Wave Spectra in Pseudoperovskite Manganites with Superexchange Interaction Competition

Gonchar

¹

2023

Appl Magn Reson

0

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In compounds La1/3Ca2/3MnO3 and BiMnO3, a calculation of spin-wave dispersion dependences along pseudoperovskite directions of reciprocal space is made. The model includes orbitally-dependent superexchange interaction and single-ion anisotropy. Considered compounds present competing exchange interactions within magnetic unit cell because of orbital or charge-orbital ordering. The nearest neighbor superexchange interaction is taken into account. The magnetic structure and dispersion dependences of spin waves frequencies are calculated within the framework of regular multi-sublattice model. The peculiarities of frustrated magnetic spin-wave spectra are found. It is shown, that crossing and splitting of spin-waves branches in non-symmetric points of magnetic Brillouin zone is a common feature of the spectra due to exchange competition. The band structure of -point spectra for both compounds are predicted.

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On the spectral function of carriers in the pseudogap state

Belemuk

¹

,

Барабанов

²

2016

J. Exp. Theor. Phys.

0

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Spin Wave Spectra in Pseudoperovskite Manganites with Superexchange Interaction Competition

Gonchar

¹

2022

Preprint

0

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In compounds La1/3Ca2/3MnO3 and BiMnO3, a calculation of spin-wave dispersion dependences along pseudoperovskite directions of reciprocal space is made. The model includes orbitally-dependent superexchange interaction and single-ion anisotropy. Considered compounds present competing exchange interactions within magnetic unit cell because of orbital or charge-orbital ordering. The nearest neighbor superexchange interaction is taken into account. The magnetic structure and dispersion dependences of spin waves frequencies are calculated within the framework of regular multi-sublattice model. The peculiarities of frustrated magnetic spin-wave spectra are found. It is shown, that crossing and splitting of spin-waves branches in non-symmetric points of magnetic Brillouin zone is a common feature of the spectra due to exchange competition. The band structure of Γ-point spectra for both compounds are predicted.

show abstract

Spin–spin correlation length in a two-dimensional frustrated magnet and its relation to doping

Cited by 3 publications

References 62 publications

Spin Wave Spectra in Pseudoperovskite Manganites with Superexchange Interaction Competition

Spin Wave Spectra in Pseudoperovskite Manganites with Superexchange Interaction Competition

On the spectral function of carriers in the pseudogap state

Spin Wave Spectra in Pseudoperovskite Manganites with Superexchange Interaction Competition

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