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arXiv · 1901.04854

Magnetic structure of monatomic Fe chains on Re(0001): emergence of chiral multi-spin interactions

András Lászlóffy·Levente Rózsa·Krisztián Palotás·László Udvardi·László Szunyogh
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Abstract

We present results of first-principles calculations of the magnetic properties of Fe chains deposited on the Re(0001) surface. By increasing the length of the chain, a transition is found from an almost collinear antiferromagnetic state for a 5-atom-long chain to a spin spiral state with the rotational plane slightly tilted from the surface of the substrate for the 15-atom-long chain. It is shown that a classical spin model derived from the ab initio calculations containing only two-spin interactions supports opposite chirality of the spin spiral compared to a direct optimization of the spin configuration within the ab initio method. The differences between the results of the two methods can be understood by introducing chiral four-spin interactions in the spin model.

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András Lászlóffy, Levente Rózsa, Krisztián Palotás, László Udvardi, László Szunyogh. 2019-05-30. Magnetic structure of monatomic Fe chains on Re(0001): emergence of chiral multi-spin interactions. https://doi.org/10.1103/physrevb.99.184430

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