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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 38 for “"Skyrmions"”.
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Skyrmions -- beyond rigid body quantisation
… are described as topological solitons known as Skyrmions. To make contact with nuclear data one must quantise these Skyrmions; most calculations to date have used rigid body quantisation, where the Skyrmions are allowed to rotate but remain rigid. The method reproduces some experimental results …
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Skyrmions and Biskyrmions in Magnetic Films
<p>Skyrmions have garnered significant attention in condensed matter systems in recent years. In principle, they are topologically protected, so there is a large energy barrier preventing their annihilation. Furthermore, they can exist at the nanoscale, be manipulated with very small currents, and …
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Collision induced decay of metastable baby skyrmions
… particles which may be modeled as solitons (skyrmions of the Higgs field), relating their particle number to a winding number. Previous work has shown that the electroweak interactions admit processes in which these solitons decay, violating standard model baryon number. We motivate the …
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Skyrmions and non-collinear magnetic domains in Fe₃GeTe₂
… to host nanoscale magnetic whirlpools called skyrmions. The vdW nature of Fe3GeTe2 means we can exfoliate 2D layers that can be easily incorporated into a wide range of devices. Behaving as particles that can be manipulated, skyrmions are potentially useful for topological quantum computing …
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Magnetic Skyrmions in Multilayers with Interfacial Dzyaloshinskii-Moriya Interactions
<p>Magnetic skyrmions, topologically stable spin textures that can be driven by electric currents efficiently, have both rich physics and potential applications in future technology such as spintronic devices for data storage. Magnetic skyrmions in multilayers with interfacial Dzyaloshinskii-Moriya …
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Atomistic Study of Traveling Skyrmions in Multi-Sublattice Magnetic Materials
… be encoded by magnetic twisted textures called skyrmions, which can be efficiently driven by applying electrical current. Recently, emphasis has been placed on investigating antiferromagnetic and ferrimagnetic skyrmions, as opposed to the single-sublattice ferromagnetic ones studied earlier, due …
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NON-VOLATILE IN-MEMORY COMPUTING WITH SKYRMIONS AND PHASE CHANGE MEMORIES
… promising design strategies for NVIMCEs using skyrmions and phase-change memories. The proposed design strategies achieved ultra-low power consumption and low latencies needed for future edge devices in Internet of Smart Things.
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Static and dynamic properties of magnetic Skyrmions in engineered multilayer films
Magnetic textures known as skyrmions promise new breakthroughs in memory, logic, and neuromorphic applications. Skyrmions have been found in a variety of material systems, yet there existed no experimental evidence of a material that could simultaneously host them at room temperature and also allow …
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B=4N Nuclei in the Skyrme Model
… nuclei via topological solitons known as Skyrmions. The B = 4 Skyrmion is of particular importance as its symmetry and stability means that multiple B = 4 Skyrmions can combine with each other to form larger B = 4N Skyrmions. In this thesis we investigate the properties of these B = 4N …
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Optimization of magnetic thin films for generating stable chiral magnetic structures
… of ferrimagnetic and antiferromagnetic films. Skyrmions are topologically protected chiral spin structures that are highly promising candidates for magnetic bits due to their stability and potential for fast motion. These spin structures can be used to encode O's and l's in racetrack memory …
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Ordering processes and pattern formation in systems far from equilibrium
… on a spatially heterogeneous lattice. Magnetic skyrmions have been a subject of great interest in recent years. They have been proposed to be at the heart of next-generation computing and information storage devices. One interesting feature of magnetic skyrmions is the presence of the …
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Nanometer scale observation of magnetization textures induced by ultrashort laser pulses
… topological magnetic solitons called magnetic skyrmions in ferromagnetic multilayer systems. Discovering the mechanisms that drive the laser-induced magnetization effects as well as their speed is not only of fundamental interest, but also relevant for potential spintronic applications. In this …
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Rovibrational Dynamics of Nuclei and Molecules
… models. Firstly we consider small vibrations of Skyrmions (topological solitons which model atomic nuclei), developing new approximations to their quantum energy spectra which incor- porate both rotation-vibration and isorotation-vibration corrections. We find that the forms of these corrections …
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Atomistic Simulations of Antiferromagnetic Solitons and their High-Speed Dynamics
… states called solitons namely Domain Walls and Skyrmions, can be efficiently driven by currents and achieve velocities of several kilometers per second. These solitons are massive particles and therefore cannot travel faster than a limiting velocity akin to the speed of light for the material. …
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Pattern formations and relaxation dynamics in non-equilibrium systems
… games and systems of interacting magnetic skyrmions. We numerically study two predator-prey systems characterized by nested pattern formations. We first consider a six species game in which spiral patterns spontaneously form within coarsening domains. Through a systematic investigation of …
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Manipulation of spin textures by unconventional spin torques
… magnetization textures such as domain walls and skyrmions provide both a means to control magnetism in devices, and to gain new fundamental insights into spin-charge and spin-orbital interactions in magnetic materials. In this thesis, we examine novel mechanisms for the evolution and control of …
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Magnetic thin films For spintronic memory
… uniformly magnetized regions called domains. Skyrmions are circular magnetic domains with chiral domain walls that are interesting due to their stability and potential for fast motion. These spin structures can be used to encode Os and Is in spintronic memory. Chiral domain walls and skyrmions …
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Quantum critical matter: Casimir pairing, emergent orders and topological defects
… CDW. Finally, we consider topological defects (skyrmions and merons) in frustrated magnets which are in the vicinity of a phase transition from a collinear to a spiral magnetic state. We show that isolated metastable skyrmions can exist in the absence of an external magnetic field in frustrated …
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