Magnetic Bloch-point hopping in multilayer skyrmions and associated emergent electromagnetic signatures
7
TL;DR: In this paper, the authors theoretically demonstrate the annihilation of single skyrmions occurring through a multilayer structure, which is mediated by the hopping dynamics of topological hedgehog singularities known as Bloch points.
read more
Abstract: Magnetic multilayers are promising tunable systems for hosting magnetic skyrmions at/above room temperature. Revealing their intriguing switching mechanisms and associated inherent electrical responses are prerequisites for developing skyrmionic devices. In this Letter, we theoretically demonstrate the annihilation of single skyrmions occurring through a multilayer structure, which is mediated by the hopping dynamics of topological hedgehog singularities known as Bloch points. The emerging intralayer dynamics of Bloch points are dominated by the Dzyaloshinskii-Moriya interaction, and their propagation can give rise to solenoidal emergent electric fields in the vicinity. Moreover, as the topology of spin textures can dominate their emergent magnetic properties, we show that the Bloch-point hopping through the multilayer will modulate the associated topological Hall response, with the magnitude proportional to the effective topological charge. We also investigate the thermodynamic stability of these states regarding the layer-dependent magnetic properties. This study casts light on the emergent electromagnetic signatures of skyrmion-based spintronics, rooted in magnetic-multilayer systems.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
Bloch points stabilization by means of diameter modulations in cylindrical nanowires
TL;DR: In this article , the authors studied the robustness of such BPs depending on geometrical parameters, such as the diameter and thickness of the cylindrical modulations as well as on external magnetic fields applied along the axis.
7
Tailoring energy barriers of Bloch-point-mediated transitions between topological spin textures
Y. Li,Yuzhe Zang,Runze Chen,Christoforos Moutafis +3 more
TL;DR: Tailoring energy barriers of Bloch-point-mediated transitions between topological spin textures explores the stabilities and transitions of various topological spin textures in chiral magnets. The energy barriers associated with the creation/destruction of Bloch points are tailored by modulating the local property of a surface, leading to the manipulation of stabilities and transition barriers of topological spin textures.
Tailoring energy barriers of Bloch-point-mediated transitions between topological spin textures
07 Mar 2023
TL;DR: In this paper , the authors theoretically demonstrate the stabilities of various topological spin textures against homochiral states in chiral magnets, including chiral bobbers, dipole strings, and skyrmion tubes.
Control of a twisted domain wall motion supported by topology
Seong Tae Kim,Hee-Sung Han,Mi-Young Im,Soong-Geun Je +3 more
TL;DR: Control of a twisted domain wall motion supported by topology. The topological robustness of the direction of the Bloch wall component in the twisted domain wall allows for wide controllability of the domain wall speed.
Voltage-Controlled Skyrmionic Interconnect with Multiple Magnetic Information Carriers
Runze Chen,Yu Li +1 more
TL;DR: In this article , the authors proposed a spintronic interconnect device where multiple sequences of information signals are encoded and transmitted simultaneously by skyrmions and antiskyrmionites.
References
Generalized Gradient Approximation Made Simple
TL;DR: A simple derivation of a simple GGA is presented, in which all parameters (other than those in LSD) are fundamental constants, and only general features of the detailed construction underlying the Perdew-Wang 1991 (PW91) GGA are invoked.
Ab initio molecular dynamics for liquid metals.
Georg Kresse,Jürgen Hafner +1 more
TL;DR: In this paper, the authors present an ab initio quantum-mechanical molecular-dynamics calculations based on the calculation of the electronic ground state and of the Hellmann-Feynman forces in the local density approximation.
41.5K
Accurate spin-dependent electron liquid correlation energies for local spin density calculations: a critical analysis
TL;DR: The authors assess various approximate forms for the correlation energy per particle of the spin-polarized homogeneous electron gas that have frequently been used in applications of the local spin density a...
Anisotropic Superexchange Interaction and Weak Ferromagnetism
TL;DR: In this paper, the Anderson theory of superexchange was extended to include spin-orbit coupling and the antisymmetric spin coupling suggested by Dzialoshinski from purely symmetry grounds and the symmetric pseudodipolar interaction were derived.
7.2K
•Book
Electronic transport in mesoscopic systems
Supriyo Datta
- 01 Jan 1995
TL;DR: In this article, preliminary concepts of conductance from transmission, S-matrix and Green's function formalism are discussed. And double-barrier tunnelling is considered.
6.3K