The 2020 Skyrmionics Roadmap

Abstract

The notion of non-trivial topological winding in condensed matter systems represents a major area of present-day theoretical and experimental research. Magnetic materials offer a versatile platform that is particularly amenable for the exploration of topological spin solitons in real space such as skyrmions. First identified in non-centrosymmetric bulk materials, the rapidly growing zoology of materials systems hosting skyrmions and related topological spin solitons includes bulk compounds, surfaces, thin films, heterostructures, nano-wires and nano-dots. This underscores an exceptional potential for major breakthroughs ranging from fundamental questions to applications as driven by an interdisciplinary exchange of ideas between areas in magnetism which traditionally have been pursued rather independently. The skyrmionics roadmap provides a review of the present state of the art and the wide range of research directions and strategies currently under way. These are, for instance, motivated by the identification of the fundamental structural properties of skyrmions and related textures, processes of nucleation and annihilation in the presence of non-trivial topological winding, an exceptionally efficient coupling to spin currents generating spin transfer torques at tiny current densities, as well as the capability to purpose-design broad-band spin dynamic and logic devices.

J. Phys. D, accepted for publication

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• The chiral Hall effect of magnetic skyrmions from a cyclic cohomology approach
• Chirality-driven orbital magnetic moments as a new probe for topological magnetic structures
• Extension of the standard Heisenberg Hamiltonian to multispin exchange interactions
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• Neutron study of in-plane skyrmions in MnSi thin films
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Cited by in corpus (148)

• Roadmap of spin-orbit torques
• Antiferromagnetic Half-skyrmions and Bimerons at room temperature
• Statics and Dynamics of Skyrmions Interacting with Pinning: A Review
• Magnetic Skyrmions for Unconventional Computing
• All-Electrical Skyrmionic Bits in a Chiral Magnetic Tunnel Junction
• Current-driven dynamics and ratchet effect of skyrmion bubbles in a ferrimagnetic insulator
• Magnetic skyrmion braids
• Skyrmion pinning energetics in thin film systems
• Reversible Transformation between Isolated Skyrmions and Bimerons
• Doping control of magnetic anisotropy for stable antiskyrmion formation in schreibersite (Fe,Ni)${}_3$P with $S_4$ symmetry
• Probing the topology of the quantum analog of a classical skyrmion
• Coupled skyrmion breathing modes in synthetic ferri- and antiferromagnets
• Dynamic Excitations of Chiral Magnetic Textures
• Annihilation and Control of Chiral Domain Walls with Magnetic Fields
• Controlled Creation of Quantum Skyrmions
• Inhomogeneous ferromagnetism mimics signatures of the topological Hall effect in SrRuO${}_3$ films
• Field-driven metamorphoses of isolated skyrmions within the conical state of cubic helimagnets
• Thermodynamic insights into the intricate magnetic phase diagram of EuAl${}_4$
• Atomic scale visualization of topological spin textures in the chiral magnet MnGe
• Magnon-Skyrmion Hybrid Quantum Systems: Tailoring Interactions via Magnons
• Non-planar geometrical effects on the magnetoelectrical signal in a three-dimensional nanomagnetic circuit
• Stable skyrmion bundles at room temperature and zero magnetic field in a chiral magnet
• Screw dislocations in cubic chiral magnets
• Skyrmion-size dependence of the topological Hall effect: A real-space calculation
• Interaction of a Neel-type skyrmion and a superconducting vortex
• Modelling spin waves in noncollinear antiferromagnets: spin-flop states, spin spirals, skyrmions and antiskyrmions
• Curvature induced drift and deformation of magnetic skyrmions: comparison of ferro- and antiferromagnetic cases
• A theory of skyrmion crystal formation
• Skyrmion-Magnetic Tunnel Junction Synapse with Mixed Synaptic Plasticity for Neuromorphic Computing
• Magnonic Hall Effect and Magnonic Holography of Hopfions
• Isolated Skyrmions in the $C{P}^2$ nonlinear $\sigma$-model with a Dzyaloshinskii-Moriya type interaction
• Laminar and transiently disordered dynamics of a magnetic skyrmion pipe flow
• Quantum fluctuations in the order parameter of quantum skyrmion crystals
• Quantum topological phase transitions in skyrmion crystals
• Nonzero Skyrmion Hall Effect in Topologically Trivial Structures
• Skyrmion inertia in synthetic antiferromagnets
• Configurable pixelated skyrmions on nanoscale magnetic grids
• Skyrmion-Bubble Bundles in an X-type Sr2Co2Fe28O46 Hexaferrite above Room Temperature
• Electronic scattering off a magnetic hopfion
• Emergence of mesoscale quantum phase transitions in a ferromagnet
• All-electrical Magnon Transport Experiments in Magnetically Ordered Insulators
• Bifurcation of a Topological Skyrmion String
• Skyrmion Alignment and Pinning Effects in a Disordered Multi-Phase Skyrmion Material Co8Zn8Mn4
• Magnon dynamics in a Skyrmion-textured domain wall of antiferromagnets
• Creating arbitrary sequences of mobile magnetic skyrmions and antiskyrmions
• Estimating Patterns of Classical and Quantum Skyrmion States
• Skyrmions and Hopfions in 3D Frustrated Magnets
• Observation of a new light-induced skyrmion phase in the Mott insulator Cu2OSeO3
• Current-induced nucleation and motion of zero field skyrmion
• Skyrmion Mass from Spin-Phonon Interaction
• Spin-wave driven bidirectional domain wall motion in kagome antiferromagnets
• Breathing Modes of Skyrmion Strings in a Synthetic Antiferromagnet
• Band filling effects on the emergence of magnetic skyrmions: Pd/Fe and Pd/Co bilayers on Ir(111)
• Transformations from stripy states to skyrmion crystals
• Reconstruction of classical skyrmions from Anderson towers: quantum Darwinism in action
• Room-Temperature Magnetic Skyrmions in Pt/Co/Cu Multilayers
• Effect of Chiral Damping on the dynamics of chiral domain walls and skyrmions
• Repulsion of a Néel-type skyrmion from a Pearl vortex in thin ferromagnet-superconductor heterostructures
• Bimerons create bimerons: proliferation and aggregation induced by currents and magnetic fields
• Geometrically constrained Skyrmions
• Current-driven motion of magnetic domain-wall skyrmions
• Electric field control of moiré skyrmion phases in twisted multiferroic NiI${}_2$ bilayers
• Structural transition of skyrmion quasiparticles under compression
• Spatially reconfigurable topological textures in freestanding antiferromagnetic nanomembranes
• Proposal for all-electrical skyrmion detection in van der Waals tunnel junctions
• Spacetime magnetic hopfions: from internal excitations and braiding of skyrmions
• Resonant optical topological Hall conductivity from skyrmions
• Current-induced H-shaped-skyrmion creation and their dynamics in the helical phase
• Skyrmionics in correlated oxides
• Chirality inversion and radius blow-up of a Néel-type skyrmion by a Pearl vortex
• Nematic and smectic stripe phases and stripe-SkX transformations
• Collective excitations in chiral Stoner magnets
• Current-Induced Dynamics of Chiral Magnetic Structures: Creation, Motion, and Applications
• Tailoring the anomalous Hall effect of SrRuO${}_3$ thin films by strain: a first principles study
• Visualization of Skyrmion-Superconducting Vortex Pairs in a Chiral-Magnet-Superconductor Heterostructure
• Antiskyrmions and their electrical footprint in crystalline mesoscale structures of Mn${}_{1.4}$PtSn
• Antiskyrmionic ferroelectric medium
• Antichiral Ferromagnetism
• Suppression of the skyrmion Hall effect in synthetic ferrimagnets with gradient magnetization
• Nonlinear dynamics of skyrmion strings
• Nano-engineering the evolution of skyrmion crystal in synthetic antiferromagnets
• A route towards stable homochiral topological textures in A-type antiferromagnets
• Late stages in the ordering of magnetic skyrmion lattices
• Skyrmion Sliding Switch in a 90-nm-Wide Nanostructured Chiral Magnet
• Quantum States of a Skyrmion in a 2D Antiferromagnet
• Response of the chiral soliton lattice to spin polarized currents
• Effects of interlayer exchange on collapse mechanisms and stability of magnetic skyrmions
• Resonant elastic X-ray scattering of antiferromagnetic superstructures in EuPtSi${}_3$
• Topological phase transitions and Berry-phase hysteresis in exchange-coupled nanomagnets
• Structural and Magnetic Properties of Pt/Co/Mn-Based Multilayers
• Magnetic particles and strings in iron langasite
• All-electric control of skyrmion-bimeron transition in van der Waals heterostructures
• Ultra-sensitive voltage-controlled skyrmion-based spintronic diode
• An Atomically Tailored Chiral Magnet with Small Skyrmions at Room Temperature
• Anatomy of spin wave driven magnetic texture motion via magnonic torques
• Photocontrol of spin scalar chirality in centrosymmetric itinerant magnets
• Texture-induced spin-orbit coupling and Skyrmion-electron bound states in a Néel antiferromagnet
• From the spin eigenmodes of isolated Néel skyrmions to the magnonic bands of a skyrmionic crystal: a micromagnetic study as a function of the strength of both the interfacial Dzyaloshinskii-Moriya and the exchange constants
• Superconducting Diode sensor
• Instability of magnetic skyrmion strings induced by longitudinal spin currents
• The quantum skyrmion Hall effect in f electron systems
• Quantifying the magnetic interactions governing chiral spin textures using deep neural networks
• Pressure induced isostructural phase transition in biskyrmion host hexagonal MnNiGa
• Moving skyrmions in Antiferromagnets by Sublattice Displacements
• Global Rotation of Skyrmion Bags under Vertical Microwave Fields
• Creation of domain-wall Skyrmions in chiral magnets
• Spin-hedgehog-derived electromagnetic effects in itinerant magnets
• Skyrmion Lattice Manipulation with Electric Currents and Thermal Gradients in MnSi
• Electrically-excited Motion of Topological Defects in Multiferroic Materials
• Reversible magnetic domain reorientation induced by magnetic field pulses with fixed direction
• Zero Field Antiferromagnetically Coupled Skyrmions and their Field-Driven Uncoupling in Composite Chiral Multilayers
• Current-controlled creations, deletions, and topological transformations of a single magnetic antiskyrmion in nanostructured cells
• Diversified Ruderman-Kittel-Kasuya-Yosida Interactions in a Nonsymmorphic Crystal
• The AiiDA-Spirit plugin for automated spin-dynamics simulations and multi-scale modelling based on first-principles calculations
• Short-wave magnons with multipole spin precession detected in the topological bands of a skyrmion lattice
• The continuum of metastable conical states of monoaxial chiral helimagnets
• X-ray holographic imaging of magnetic surface spirals in FeGe lamellae
• Sliding Dynamics of Current-Driven Skyrmion Crystal and Helix in Chiral Magnets
• Spin dynamics in the skyrmion-host lacunar spinel GaV4S8
• Operando Control of Skyrmion Density in a Lorentz Transmission Electron Microscope with Current Pulses
• Curvature-induced skyrmion deformation
• Band structure and charge ordering of Dirac semimetal EuAl${}_4$ at low temperatures
• Surface ferromagnetism in a chiral topological semimetal CoSi
• Dynamic Spin-Lattice Coupling and Statistical Interpretation for the Molecular-Like Excitations in Frustrated Pyrochlores
• Hybrid magnetization dynamics in ${\text{Cu}}_{\text{2}}{\text{OSeO}}_{\text{3}}$/$\mathrm{NiFe}$ heterostructures
• Observation of a non-reciprocal skyrmion Hall effect of hybrid chiral skyrmion tubes in synthetic antiferromagnetic multilayers
• Skyrmion-skyrmion interaction induced by itinerant electrons in a ferromagnetic strip
• Topological dipoles of quantum skyrmions
• Thermal Stability and Topological Charge Fragmentation in Antiskyrmions of Rhombohedral Barium Titanate
• Demagnetization in micromagnetics: magnetostatic self-interactions of bulk chiral magnetic skyrmions
• Higher-order modulations in the skyrmion-lattice phase of Cu${}_2$OSeO${}_3$
• Topological Textures in Zr-Substituted Barium Titanate
• Surface spin polarization in the magnetic response of GeTe Rashba ferroelectric
• Electron states, bound to a texture in a Néel antiferromagnet
• Microscopic theory of current-induced skyrmion transport and its application in disordered spin textures
• Hidden quantum correlations in the ground states of quasiclassical spin systems
• High-resolution tunneling spin transport characteristics of topologically distinct magnetic skyrmionic textures from theoretical calculations
• Magnetic Bloch-point hopping in multilayer skyrmions and associated emergent electromagnetic signatures
• Hydrogen toggling between Yoshimori spin spirals and elliptical Dzyaloshinskii-Moriya skyrmions in Fe on Ir(110)
• Magneto-Optical Analysis of Magnetic Anisotropy in Ultrathin Tm${}_3$Fe${}_5$O${}_{12}$/Pt Bilayers
• Entropic magnetic interlayer coupling
• Hopfions in screw chiral magnets
• Impact of curvature-induced Dzyaloshinskii-Moriya interaction on magnetic vortex texture in spherical caps
• Interplay of electric and magnetic fields in skyrmion phases of the classical Heisenberg model on a square lattice
• Creation of domain-wall skyrmions in chiral magnets with Landau-Lifshitz-Gilbert dynamics and demagnetization
• Effects of interlayer Dzyaloshinskii-Moriya interaction on the shape and dynamics of magnetic twin-skyrmions
• Magnon band structure of skyrmion crystals and stereographic projection approach
• A $C^{\ast }$-algebraic view on the interaction of real- and reciprocal space topology in skyrmion crystals