Antisymmetric Exchange in a Real Copper Triangular Complex
Mohammed-Amine Bouammali1, Nicolas Suaud1, Nathalie Guihéry1
1Laboratoire de Chimie et Physique Quantiques, UMR5626, Université de Toulouse 3, Paul Sabatier, 18 route de Narbonne, 31062 Toulouse, France.
Inorganic Chemistry
|July 27, 2022
Summary
This study elucidates the origin of the Dzyaloshinskii-Moriya interaction (DMI) in a tri-copper(II) complex. It demonstrates the applicability of multispin Hamiltonians and parameter transferability from binuclear models for understanding this antisymmetric exchange.
Area of Science:
- Quantum Chemistry
- Condensed Matter Physics
- Materials Science
Background:
- The Dzyaloshinskii-Moriya interaction (DMI), or antisymmetric exchange, is crucial in magnetic materials but theoretically challenging.
- Few *ab initio* studies have investigated DMI, especially in multi-center systems, despite its origin in electronic interactions and spin-orbit coupling.
- Understanding DMI is key for designing novel magnetic materials and devices.
Purpose of the Study:
- To theoretically highlight the origin of DMI in a real tri-copper(II) complex.
- To validate the use of multispin model Hamiltonians for trinuclear and higher nuclearity complexes.
- To assess the transferability of model parameters from binuclear to trinuclear systems.
Main Methods:
- Utilized *ab initio* electronic structure calculations.
- Employed a simplified structural model to facilitate demanding calculations.
- Applied multispin model Hamiltonians and permutation relationships for analysis.
Main Results:
- Confirmed the appropriateness of multispin model Hamiltonians for trinuclear systems.
- Demonstrated successful transferability of model parameters from binuclear to trinuclear complexes.
- Provided a detailed explanation of DMI physics within the studied copper triangle.
Conclusions:
- The study establishes a robust theoretical framework for investigating DMI in multi-center systems.
- Parameter transferability simplifies DMI analysis in more complex magnetic structures.
- Encourages further theoretical and experimental efforts to explore DMI in similar systems.
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