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Ab initio calculation on Herbertsmithite: exchange interactions including extra-plane magnetic impurities, Dzyaloshinskii-Moriya and anisotropic coupling by Heully-Alary, Flaurent; Amor, Nadia Ben; Suaud, Nicolas; Messio, Laura; de Graaf, Coen; Guihéry, Nathalie is a scholarly article available to read on EtoBox.

What is Ab initio calculation on Herbertsmithite: exchange interactions including extra-plane magnetic impurities, Dzyaloshinskii-Moriya and anisotropic coupling about?

A detailed ab initio evaluation of the isotropic and anisotropic exchange interactions of Herbertsmithite is presented. This compound crystallizes in a so-called Kagome lattice and the S=1/2 spin structure is not fully resolved despite numerous experimental and theoretical studies. The present study not only focusses on the leading in-plane nearest neighbor isotropic interactions, but also other less well studied interactions such as the anisotropic exchange and the Dzyaloshinskii-Moriya (DM) interactions. The anisotropic exchange is very weak, but the DM interactions are sizeable with a strong in-plane component, typically obviated in model studies. Moreover, it is shown that the extra-plane magnetic impurities have a non-negligible interaction with the regular in-plane magnetic sites. Combined with an estimated occurrence of these magnetic impurities of ~15%, the present results indicate that two-dimensional magnetic models only describe part of the physics.

Author

Heully-Alary, Flaurent; Amor, Nadia Ben; Suaud, Nicolas; Messio, Laura; de Graaf, Coen; Guihéry, Nathalie

Published

2025

Language

EN