An STM study resolves the d-pi-d exchange coupling in a surface Fe2ReA4 tetramer and predicts the two-radical spin-excitation spectrum from one fitted coupling parameter.
Each ReA radical spin couples to Fe through the carboxyl group with exchange energy j (bridge) and J (wing), respectively
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Atomic-scale observation of $d$-$\pi$-$d$ spin coupling in coordination structures
An STM study resolves the d-pi-d exchange coupling in a surface Fe2ReA4 tetramer and predicts the two-radical spin-excitation spectrum from one fitted coupling parameter.