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Realizing All-Spin–Based Logic Operations Atom by Atom

Science  27 May 2011:
Vol. 332, Issue 6033, pp. 1062-1064
DOI: 10.1126/science.1201725

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Abstract

An ultimate goal of spintronic research is the realization of concepts for atomic-scale all-spin–based devices. We combined bottom-up atomic fabrication with spin-resolved scanning tunneling microscopy to construct and read out atomic-scale model systems performing logic operations. Our concept uses substrate-mediated indirect exchange coupling to achieve logical interconnection between individual atomic spins. Combined with spin frustration, this concept enables various logical operations between inputs, such as NOT and OR.

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