CP2 skyrmions and skyrmion crystals in realistic quantum magnets

H Zhang, Z Wang, D Dahlbom, K Barros… - Nature …, 2023 - nature.com
Magnetic skyrmions are nanoscale topological textures that have been recently observed in
different families of quantum magnets. These objects are called CP1 skyrmions because …

Theory of spin excitations in a quantum spin-nematic state

A Smerald, N Shannon - Physical Review B—Condensed Matter and Materials …, 2013 - APS
The idea that a quantum magnet could act like a liquid crystal, breaking spin-rotation
symmetry without breaking time-reversal symmetry, holds an abiding fascination. However …

skyrmion crystals in an SU(3) magnet with a generalized Dzyaloshinskii-Moriya interaction

Y Amari, Y Akagi, SB Gudnason, M Nitta, Y Shnir - Physical Review B, 2022 - APS
We study CP 2 skyrmion crystals in the ferromagnetic SU (3) Heisenberg model with a
generalization of the Dzyaloshinskii-Moriya interaction and the Zeeman term. The model …

Semi-classical simulation of spin-1 magnets

K Remund, R Pohle, Y Akagi, J Romhányi… - Physical Review …, 2022 - APS
Theoretical studies of magnets have traditionally concentrated on either classical spins, or
the extreme quantum limit of spin-1/2. However, magnets built of spin-1 moments are also …

Topological, non-topological and instanton droplets driven by spin-transfer torque in materials with perpendicular magnetic anisotropy and Dzyaloshinskii–Moriya …

M Carpentieri, R Tomasello, R Zivieri, G Finocchio - Scientific Reports, 2015 - nature.com
Abstract The interfacial Dzyaloshinskii–Moriya Interaction can modify the topology of
droplets excited by a localized spin-polarized current. Here, we show that, in addition to the …

Isolated skyrmions in the nonlinear sigma model with a Dzyaloshinskii-Moriya type interaction

Y Akagi, Y Amari, N Sawado, Y Shnir - Physical Review D, 2021 - APS
We study two dimensional soliton solutions in the CP 2 nonlinear sigma model with a
Dzyaloshinskii-Moriya type interaction. First, we derive such a model as a continuous limit of …

Dynamics and relaxation in spin nematics

VG Bar'Yakhtar, VI Butrim, AK Kolezhuk… - Physical Review B …, 2013 - APS
We study the dynamics and relaxation of elementary excitations (magnons) in the spin
nematic (quadrupole ordered) phase of S= 1 magnets. We develop a general …

Theory of inelastic neutron scattering in a field-induced spin-nematic state

A Smerald, HT Ueda, N Shannon - Physical Review B, 2015 - APS
We develop a theory of spin excitations in a field-induced spin-nematic state, and use it to
show how a spin-nematic order can be indentified using inelastic neutron scattering. We …

Magnetic vortex as a ground state for micron-scale antiferromagnetic samples

EG Galkina, AY Galkin, BA Ivanov, F Nori - Physical Review B—Condensed …, 2010 - APS
Here we consider micron-sized samples with any axisymmetric body shape and made with a
canted antiferromagnet, like hematite or iron borate. We find that its ground state can be a …

Quantum solitons with emergent interactions in a model of cold atoms on the triangular lattice

HT Ueda, Y Akagi, N Shannon - Physical Review A, 2016 - APS
Cold atoms bring new opportunities to study quantum magnetism, and in particular, to
simulate quantum magnets with symmetry greater than SU (2). Here we explore the …