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- W3146795555 abstract "This paper is a theoretical “proof of concept” on how the on-site first-order spin–orbit coupling (SOC) can generate giant Dzyaloshinskii–Moriya interactions in binuclear transition metal complexes. This effective interaction plays a key role in strongly correlated materials, skyrmions, multiferroics, and molecular magnets of promising use in quantum information science and computing. Despite this, its determination from both theory and experiment is still in its infancy and existing systems usually exhibit very tiny magnitudes. We derive analytical formulas that perfectly reproduce both the nature and the magnitude of the Dzyaloshinskii–Moriya interaction calculated using state-of-the-art ab initio calculations performed on model bicopper(II) complexes. We also study which geometrical structures/ligand-field forces would enable one to control the magnitude and the orientation of the Dzyaloshinskii–Moriya vector in order to guide future synthesis of molecules or materials. This article provides an understanding of its microscopic origin and proposes recipes to increase its magnitude. We show that (i) the on-site mixings of 3d orbitals rule the orientation and magnitude of this interaction, (ii) increased values can be obtained by choosing more covalent complexes, and (iii) huge values (∼1000 cm−1) and controlled orientations could be reached by approaching structures exhibiting on-site first-order SOC, i.e., displaying an “unquenched orbital momentum.”" @default.
- W3146795555 created "2021-04-13" @default.
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- W3146795555 date "2021-04-07" @default.
- W3146795555 modified "2023-10-14" @default.
- W3146795555 title "How to create giant Dzyaloshinskii–Moriya interactions? Analytical derivation and <i>ab initio</i> calculations on model dicopper(II) complexes" @default.
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- W3146795555 doi "https://doi.org/10.1063/5.0045569" @default.
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