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Heisenberg-exchange-free nanoskyrmion mosaic

Authors :
Stepanov, E. A.
Nikolaev, S. A.
Dutreix, C.
Katsnelson, M. I.
Mazurenko, V. V.
Source :
Journal of Physics: Condensed Matter 31, 17LT01 (2019)
Publication Year :
2017

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.

Details

Database :
arXiv
Journal :
Journal of Physics: Condensed Matter 31, 17LT01 (2019)
Publication Type :
Report
Accession number :
edsarx.1710.03044
Document Type :
Working Paper
Full Text :
https://doi.org/10.1088/1361-648X/ab02b9