A gateway towards non-collinear spin processing using three-atom magnets with strong substrate coupling

J. Hermenau, J. Ibañez-Azpiroz, Chr. Hübner, A. Sonntag, B. Baxevanis, K. T. Ton, M. Steinbrecher, A. A. Khajetoorians, M. dos Santos Dias, S. Blügel, R. Wiesendanger, S. Lounis and J. Wiebe ()
Additional contact information
J. Hermenau: Hamburg University
J. Ibañez-Azpiroz: Forschungszentrum Jülich & JARA
Chr. Hübner: Hamburg University
A. Sonntag: Hamburg University
B. Baxevanis: Leiden University
K. T. Ton: Hamburg University
M. Steinbrecher: Hamburg University
A. A. Khajetoorians: Hamburg University
M. dos Santos Dias: Forschungszentrum Jülich & JARA
S. Blügel: Forschungszentrum Jülich & JARA
R. Wiesendanger: Hamburg University
S. Lounis: Forschungszentrum Jülich & JARA
J. Wiebe: Hamburg University

Nature Communications, 2017, vol. 8, issue 1, 1-9

Abstract: Abstract A cluster of a few magnetic atoms on the surface of a nonmagnetic substrate is one suitable realization of a bit for spin-based information technology. The prevalent approach to achieve magnetic stability is decoupling the cluster spin from substrate conduction electrons in order to suppress destabilizing spin-flips. However, this route entails less flexibility in tailoring the coupling between the bits needed for spin-processing. Here, we use a spin-resolved scanning tunneling microscope to write, read, and store spin information for hours in clusters of three atoms strongly coupled to a substrate featuring a cloud of non-collinearly polarized host atoms, a so-called non-collinear giant moment cluster. The giant moment cluster can be driven into a Kondo screened state by simply moving one of its atoms to a different site. Using the exceptional atomic tunability of the non-collinear substrate mediated Dzyaloshinskii–Moriya interaction, we propose a logical scheme for a four-state memory.

Date: 2017
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DOI: 10.1038/s41467-017-00506-7

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