Measurement of the conductance of a hydrogen molecule

R. H. M. Smit, Y. Noat, C. Untiedt, N. D. Lang, M. C. van Hemert and J. M. van Ruitenbeek ()
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R. H. M. Smit: Universiteit Leiden
Y. Noat: Universiteit Leiden
C. Untiedt: Universiteit Leiden
N. D. Lang: Thomas J. Watson Research Center
M. C. van Hemert: Universiteit Leiden
J. M. van Ruitenbeek: Universiteit Leiden

Nature, 2002, vol. 419, issue 6910, 906-909

Abstract: Abstract Recent years have shown steady progress towards molecular electronics1,2, in which molecules form basic components such as switches3,4,5, diodes6 and electronic mixers7. Often, a scanning tunnelling microscope is used to address an individual molecule, although this arrangement does not provide long-term stability. Therefore, metal–molecule–metal links using break-junction devices8,9,10 have also been explored; however, it is difficult to establish unambiguously that a single molecule forms the contact11. Here we show that a single hydrogen molecule can form a stable bridge between platinum electrodes. In contrast to results for organic molecules, the bridge has a nearly perfect conductance of one quantum unit, carried by a single channel. The hydrogen bridge represents a simple test system in which to understand fundamental transport properties of single-molecule devices.

Date: 2002
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DOI: 10.1038/nature01103

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