Longitudinal spin dynamics in nickel fluorosilicate

Галкина, Е. Г.; Иванов, Б. А.; Butrim, V. I.

doi:10.1063/1.4890989

Cited by 15 publications

(5 citation statements)

References 32 publications

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“…To classically model systems in the regime D ≳ ∣ J 1 ∣, however, it is necessary to retain more structure from the quantum spin-1 states, which live in a local Hilbert space of dimension N = 3. Specifically, our classical limit will assume that the many-body quantum state is a direct product of SU(3) coherent states 45 – 52 : where is a complex vector of unit length and is an orthonormal basis for the local Hilbert state on-site j .…”

Section: Modelmentioning

confidence: 99%

CP2 skyrmions and skyrmion crystals in realistic quantum magnets

et al. 2023

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Magnetic skyrmions are nanoscale topological textures that have been recently observed in different families of quantum magnets. These objects are called CP1 skyrmions because they are built from dipoles—the target manifold is the 1D complex projective space, CP1 ≅ S2. Here we report the emergence of magnetic CP2 skyrmions in a realistic spin-1 model, which includes both dipole and quadrupole moments. Unlike CP1 skyrmions, CP2 skyrmions can also arise as metastable textures of quantum paramagnets, opening a new road to discover emergent topological solitons in non-magnetic materials. The quantum phase diagram of the spin-1 model also includes magnetic field-induced CP2 skyrmion crystals that can be detected with regular momentum- (diffraction) and real-space (Lorentz transmission electron microscopy) experimental techniques.

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Section: Modelmentioning

confidence: 99%

CP2 skyrmions and skyrmion crystals in realistic quantum magnets

et al. 2023

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“…longitudinal behavior of magnons is directly associated with quantum spin reduction effect [33]. This effect is observed in magnets with " easy plane" single-ion anisotropy as well as in so called non-Heisenberg magnets that take into account high spin invariants in the exchange Hamiltonian [33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49]. Description of longitudinal behavior of anisotropic and non-Heisenberg magnets is out of the scope of the Landau-Lifshitz equation and requires to take into account the dynamics of tensor variables, which are quantum average values of bilinear operators in terms of spin components [34][35][36][37][38][39][40].…”

Section: Introductionmentioning

confidence: 99%

Effect of large single-ion anisotropy on the dynamic and static properties of a non-heisenberg ferrimagnet

Kosmachev O.A.,

Matyunina Ya.Yu.,

Fridman Yu.A.

2023

Physics of the Solid State

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The influence of a large single-ion anisotropy of the "easy plane" type on the phase states and spectra of elementary excitations of a ferrimagnet with sublattices S = 1 and sigma=1/2 and non-Heisenberg exchange interaction for a sublattice with S = 1 is studied. It is shown that for different ratios of the material parameters of the system, only one phase state is possible, characterized by both vector and tensor order parameters (quadrupole-ferrimagnetic). The condition for sublattice spin compensation is determined, as well as the behavior of the spectra of elementary excitations near the spin compensation line. In the vicinity of the spin compensation line, the magnon spectra are "antiferromagnetically similar". Keywords: large single-ion anisotropy, biquadratic exchange interaction, ferrimagnet.

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“…Продольная динамика магнонов напрямую связана с эффектом квантового сокращения спина [33]. Этот эффект наблюдается как в магнетиках с одноионной анизотропией типа " легкая плоскость", так и в, так называемых негейзенберговских магнетиках, учитывающих высшие спиновые инварианты в обменном гамильтониане [33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49]. Причем, описание продольной динамики как анизотропных, так и негейзенберговских магнетиков выходит за рамки уравнения Ландау-Лифшица и требует учета динамики тензорных переменных, представляющих собой квантовые средние от операторов, билинейных по компонентам спина [34][35][36][37][38][39][40].…”

Section: Introductionunclassified

Влияние Большой Одноионной Анизотропии На Динамические И Статические Свойства Негейзенберговского Ферримагнетика

Космачев¹,

Матюнина²,

Фридман³

2023

Физика Твердого Тела

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The influence of a large single-ion anisotropy of the “easy plane” type on the phase states and spectra of elementary excitations of a ferrimagnet with sublattices S=1 and σ=1/2 and non-Heisenberg exchange interaction for a sublattice with S=1 is studied. It is shown that for different ratios of the material parameters of the system, only one phase state is possible, characterized by both vector and tensor order parameters (quadrupole-ferrimagnetic). The condition for sublattice spin compensation is determined, as well as the behavior of the spectra of elementary excitations near the spin compensation line. In the vicinity of the spin compensation line, the magnon spectra are "antiferromagnetically similar".

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Longitudinal spin dynamics in nickel fluorosilicate

Cited by 15 publications

References 32 publications

CP2 skyrmions and skyrmion crystals in realistic quantum magnets

CP2 skyrmions and skyrmion crystals in realistic quantum magnets

Effect of large single-ion anisotropy on the dynamic and static properties of a non-heisenberg ferrimagnet

Влияние Большой Одноионной Анизотропии На Динамические И Статические Свойства Негейзенберговского Ферримагнетика

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