Kagomerization of transition metal monolayers induced by two-dimensional hexagonal boron nitride

Hangyu Zhou (), Manuel dos Santos Dias, Youguang Zhang, Weisheng Zhao () and Samir Lounis ()
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Hangyu Zhou: Forschungszentrum Jülich & JARA
Manuel dos Santos Dias: Forschungszentrum Jülich & JARA
Youguang Zhang: Beihang University
Weisheng Zhao: Beihang University
Samir Lounis: Forschungszentrum Jülich & JARA

Nature Communications, 2024, vol. 15, issue 1, 1-10

Abstract: Abstract The kagome lattice is an exciting solid state physics platform for the emergence of nontrivial quantum states driven by electronic correlations: topological effects, unconventional superconductivity, charge and spin density waves, and unusual magnetic states such as quantum spin liquids. While kagome lattices have been realized in complex multi-atomic bulk compounds, here we demonstrate from first-principles a process that we dub kagomerization, in which we fabricate a two-dimensional kagome lattice in monolayers of transition metals utilizing an hexagonal boron nitride (h-BN) overlayer. Surprisingly, h-BN induces a large rearrangement of the transition metal atoms supported on a fcc(111) heavy-metal surface. This reconstruction is found to be rather generic for this type of heterostructures and has a profound impact on the underlying magnetic properties, ultimately stabilizing various topological magnetic solitons such as skyrmions and bimerons. Our findings call for a reconsideration of h-BN as merely a passive capping layer, showing its potential for not only reconstructing the atomic structure of the underlying material, e.g. through the kagomerization of magnetic films, but also enabling electronic and magnetic phases that are highly sought for the next generation of device technologies.

Date: 2024
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DOI: 10.1038/s41467-024-48973-z

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