The anti-symmetric and anisotropic symmetric exchange interactions between electric dipoles in hafnia

Longju Yu, Hong Jian Zhao (), Peng Chen, Laurent Bellaiche and Yanming Ma ()
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Longju Yu: Jilin University
Hong Jian Zhao: Jilin University
Peng Chen: University of Arkansas
Laurent Bellaiche: University of Arkansas
Yanming Ma: Jilin University

Nature Communications, 2023, vol. 14, issue 1, 1-9

Abstract: Abstract The anti-symmetric and anisotropic symmetric exchange interactions between two magnetic dipole moments – responsible for intriguing magnetic textures (e.g., magnetic skyrmions) – have been discovered since last century, while their electric analogues were either hidden for a long time or still not known. It is only recently that the anti-symmetric exchange interactions between electric dipoles was proved to exist (with materials hosting such an interaction being still rare) and the existence of anisotropic symmetric exchange interaction between electric dipoles remains ambiguous. Here, by symmetry analysis and first-principles calculations, we identify hafnia as a candidate material hosting the non-collinear dipole alignments, the analysis of which reveals the anti-symmetric and anisotropic symmetric exchange interactions between electric dipoles in this material. Our findings can hopefully deepen the current knowledge of electromagnetism in condensed matter, and imply the possibility of discovering novel states of matter (e.g., electric skyrmions) in hafnia-related materials.

Date: 2023
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DOI: 10.1038/s41467-023-43593-5

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