Stabilization of monoatomic gold wires by carbon impurities |
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Authors: | N.V. Skorodumova S.I. Simak |
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Affiliation: | Condensed Matter Theory Group, Department of Physics, Box 530, Uppsala University, 75432 Uppsala, Sweden |
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Abstract: | The influence of atomic and molecular carbon on the structural and electronic properties of a monoatomic gold wire has been studied by means of projector augmented-wave method (PAW) within density functional theory (DFT). Our calculations show that carbon is able to enhance the stability of linear gold chains with large interatomic separations. The Au-Au spacing at breakage can be as long as ∼4.5 and 6 Å for the wires incorporating atomic (Au-C) and molecular carbon (Au-C2), respectively. The calculated band structure for nonmagnetic Au-C reveals the presence of one conduction channel for linear chains, but two channels for zigzag-like ones. A close similarity of this behaviour, to that known for a pure gold wire might indicate little influence of carbon on the conduction properties of gold nanowires. |
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Keywords: | 68.65.La 71.15.Nc 71.20.&minus b |
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