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J Phys Condens Matter. 2011 Mar 30;23(12):125303. doi: 10.1088/0953-8984/23/12/125303. Epub 2011 Mar 10.

Single OR molecule and OR atomic circuit logic gates interconnected on a Si(100)H surface.

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  • 1Institute of Materials Research and Engineering, Agency for Science, Technology and Research, 3 Research Link, Singapore 117602, Singapore.


Electron transport calculations were carried out for three terminal OR logic gates constructed either with a single molecule or with a surface dangling bond circuit interconnected on a Si(100)H surface. The corresponding multi-electrode multi-channel scattering matrix (where the central three terminal junction OR gate is the scattering center) was calculated, taking into account the electronic structure of the supporting Si(100)H surface, the metallic interconnection nano-pads, the surface atomic wires and the molecule. Well interconnected, an optimized OR molecule can only run at a maximum of 10 nA output current intensity for a 0.5 V bias voltage. For the same voltage and with no molecule in the circuit, the output current of an OR surface atomic scale circuit can reach 4 µA.

© 2011 IOP Publishing Ltd

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