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|Title:||Heisenberg-exchange-free nanoskyrmion mosaic|
|Authors:||Stepanov, E. A.|
Nikolaev, S. A.
Katsnelson, M. I.
Mazurenko, V. V.
|Publisher:||Institute of Physics Publishing|
|Citation:||Heisenberg-exchange-free nanoskyrmion mosaic / E. A. Stepanov, S. A. Nikolaev, C. Dutreix, et al. — DOI 10.1088/1361-648X/ab02b9 // Journal of Physics Condensed Matter. — 2019. — Vol. 31. — Iss. 17. — 17LT01.|
|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. In this work, we challenge this well-established paradigm, and propose to explore a Heisenberg-exchange-free magnetic world. In this case, 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. A single 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. © 2019 IOP Publishing Ltd.|
EXTERNAL MAGNETIC FIELD
ULTRACOLD ATOMIC GAS
|Appears in Collections:||Научные публикации, проиндексированные в SCOPUS и WoS CC|
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