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- W2313291248 abstract "The evolution of the atomic structure and the vibrational and electronic transport properties of gold atomic junctions incorporating molecular and atomic hydrogen upon elongation have been investigated with the nonequilibrium Green's function formalism combined with density functional theory. Our calculations show that for the case of gold junctions doped with a single ${mathrm{H}}_{2}$ molecule the low-bias conductance drops rapidly with the electrodes' separation, while it remains almost constant if a single H atom replaces the molecule. In contrast, when one considers two H atoms adsorbed on a gold monatomic chain forming an Au-H-Au-H-Au double-bridge structure, the low-bias conductance increases first and then shows a plateau upon stretching the junction, in perfect agreement with experiments on gold nanocontacts in hydrogen environment. Furthermore, also the distribution of the calculated vibrational energies of the two H atoms is consistent with the experimental result in the low-conductance region, demonstrating clear evidence that hydrogen molecules can dissociate on stretched gold monatomic chains. These findings are helpful to improve our understanding of the structure-property relation of gold nanocontacts and also provide a new prospect for gold nanowires being used as chemical sensors and catalysts." @default.
- W2313291248 created "2016-06-24" @default.
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- W2313291248 date "2016-03-31" @default.
- W2313291248 modified "2023-10-17" @default.
- W2313291248 title "Origin of the periodic structure in the conductance curve of gold nanojunctions in hydrogen environment" @default.
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- W2313291248 doi "https://doi.org/10.1103/physrevb.93.125438" @default.
- W2313291248 hasPublicationYear "2016" @default.
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