Heisenberg-exchange-free nanoskyrmion mosaic

Abstract

Isotropic Heisenberg exchange naturally appears as the main interaction in magnetism, usually favouring long-range spin-ordered phases. The anisotropic Dzyaloshinskii-Moriya interaction arises from relativistic corrections and is a priori much weaker, even though it may sufficiently compete with the isotropic one to yield new spin textures. Here, we challenge this well-established paradigm, and propose to explore a Heisenberg-exchange-free magnetic world. There, the Dzyaloshinskii-Moriya interaction induces magnetic frustration in two dimensions, from which the competition with an external magnetic field results in a new mechanism producing skyrmions of nanoscale size. The isolated nanoskyrmion can already be stabilized in a few-atom cluster, and may then be used as LEGO block to build a large magnetic mosaic. The realization of such topological spin nanotextures in sp- and p-electron compounds or in ultracold atomic gases would open a new route toward robust and compact magnetic memories.

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Cited by in corpus (12)

• Probing the topology of the quantum analog of a classical skyrmion
• Topological dynamical quantum phase transition in a quantum skyrmion phase
• Quantum topological phase transitions in skyrmion crystals
• Quantum fluctuations in the order parameter of quantum skyrmion crystals
• Estimating Patterns of Classical and Quantum Skyrmion States
• A DMI guide to magnets micro-world
• Reconstruction of classical skyrmions from Anderson towers: quantum Darwinism in action
• Topological superconductivity mediated by magnons of helical magnetic states
• Proposal for realizing quantum-spin systems on a two-dimensional square lattice with Dzyaloshinskii-Moriya interaction by Floquet engineering using Rydberg atoms
• Skyrmionic qubits stabilized by Dzyaloshinskii-Moriya interaction as platforms for qubits and quantum gates
• Impact of the honeycomb spin-lattice on topological magnons and edge states in ferromagnetic 2D skyrmion crystals
• Bridging Quantum and Classical Descriptions of Spin Dynamics in a Dzyaloshinsky-Moriya Trimer