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  • Title: Tailoring the chiral magnetic interaction between two individual atoms.
    Author: Khajetoorians AA, Steinbrecher M, Ternes M, Bouhassoune M, dos Santos Dias M, Lounis S, Wiebe J, Wiesendanger R.
    Journal: Nat Commun; 2016 Feb 23; 7():10620. PubMed ID: 26902332.
    Abstract:
    Chiral magnets are a promising route towards dense magnetic storage technology due to their inherent nano-scale dimensions and energy efficient properties. Engineering chiral magnets requires atomic-level control of the magnetic exchange interactions, including the Dzyaloshinskii-Moriya interaction, which defines a rotational sense for the magnetization of two coupled magnetic moments. Here we show that the indirect conduction electron-mediated Dzyaloshinskii-Moriya interaction between two individual magnetic atoms on a metallic surface can be manipulated by changing the interatomic distance with the tip of a scanning tunnelling microscope. We quantify this interaction by comparing our measurements to a quantum magnetic model and ab-initio calculations yielding a map of the chiral ground states of pairs of atoms depending on the interatomic separation. The map enables tailoring the chirality of the magnetization in dilute atomic-scale magnets.
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