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

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.

13 pages, 9 figures, 2 tables

References in corpus (3)

• Observation of Majorana Fermions in Ferromagnetic Atomic Chains on a Superconductor
• First principles calculation of spin-interactions and magnetic ground states of Cr trimers on Au(111)
• Domain wall profiles in Co/Ir${}_n$/Pt(111) ultrathin films: influence of the Dzyaloshinskii-Moriya interaction

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