Journal
PHYSICAL REVIEW B
Volume 69, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.69.041402
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We present a state-of-the-art first-principles analysis of electronic transport in a Pt nanocontact in the presence of H-2 which has been recently reported by Smit [Nature (London) 419, 906 (2002)]. Our results indicate that at the last stages of the breaking of the Pt nanocontact two basic forms of bridge involving H can appear. Our claim is, in contrast to the claim of Smit , that the main conductance histogram peak at Gapproximate to2e(2)/h is not due to molecular H-2, but to a complex Pt2H2 where the H-2 molecule dissociates. A first-principles vibrational analysis that compares favorably with the experimental one also supports our claim.
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