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Geometrical structure, stability and electronic properties of AunHg(\(1 \leq n \leq 12\)) clusters

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Abstract.

The geometrical structures, relative stabilities, electronic properties and chemical hardness of AunHg(\( n=1-12\)) clusters are systematically investigated using the density functional theory with relativistic all-electron methods. The optimized low-lying energy geometries exhibit two-dimensional and three-dimensional structures. Furthermore, all the lowest-energy structures of AunHg(\( n=1-12\)) clusters favor planar geometries with slight distortion, in which the dopant Hg atom prefers to occupy a peripheral site with a lower coordination. The geometrical, electronic and chemical stabilities of the AunHg cluster with even number of valence electrons are higher than those of the neighboring AunHg cluster with odd number of valence electrons. Besides, 5d valence electrons of impurity Hg atom in the AunHg cluster hardly join in the orbital interactions compared with 5d valence electrons of corresponding Au atom in Aun+1 cluster. Au-Hg bonds in AunHg clusters are weaker and have more obviously ionic-like characteristics than the corresponding Au-Au bonds in Aun+1 clusters.

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Authors and Affiliations

  1. School of Science, Southwest University of Science and Technology, 621010, Mianyang, Sichuan, China

    Wei Wan & Xiangjun Kuang

  2. College of Physics, Chongqing University, 400044, Chongqing, China

    Xiangjun Kuang

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  1. Wei Wan
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  2. Xiangjun Kuang
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Correspondence to Wei Wan.

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Wan, W., Kuang, X. Geometrical structure, stability and electronic properties of AunHg(\(1 \leq n \leq 12\)) clusters. Eur. Phys. J. Plus 131, 285 (2016). https://doi.org/10.1140/epjp/i2016-16285-1

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