A Single-Molecule Digital Full Adder
A specifically designed aza-starphene molecule is presented where contacting one, two, and/or three single Al adatoms allows this molecule to function as a “3-inputs & 2-outputs” digital full adder on a Au(111) surface. Sequentially positioning single Al adatoms with atomic precision to interact with aza-starphene, inputs one classical digit per Al, which is converted to quantum information by the molecule. The intramolecular logical calculations do not require a solid-state digital full adder cascade-like architecture. The measured Boolean truth table results in part from the quantum level repulsion effect and in part from a nonlinear magnetic effect also intrinsic to the aza-starphene molecule with its contacted Al adatoms.
Soe, W. H.; de Mendoza, P.; Echavarren, A. M.; Joachim, C.
J. Phys. Chem. Lett. 2021, 12 (35), 8528–8532
DOI:
10.1021/acs.jpclett.1c02449
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