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Structures and electronic properties of Cu-20, Ag-20, and Au-20 clusters with density functional method

机译:密度泛函法研究Cu-20,Ag-20和Au-20团簇的结构和电子性质

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摘要

We have investigated the lowest-energy structures and electronic properties of the 20-atoms coinage metal clusters (Cu-20, Ag-20, and Au-20) using density functional theory (DFT) within generalized gradient approximation. The most stable configurations obtained for Ag-20 and Au-20 clusters are tetrahedral structures T-d symmetry), while compact structure with C-s symmetry is preferred for Cu-20. Large HOMO-LUMO gap is found for Au-20 and Ag-20 with tetrahedral structures, while it is much small in the Cu-20 isomer with tetrahedral structures. The compact C-s structure of Cu-20 has large gap comparable to that of Au-20 with tetrahedral structure. (C) 2003 Elsevier B.V. All rights reserved. [References: 35]
机译:我们使用广义梯度近似内的密度泛函理论(DFT)研究了20个原子的造币金属簇(Cu-20,Ag-20和Au-20)的最低能级结构和电子性质。对于Ag-20和Au-20团簇,最稳定的构型是四面体结构T-d对称性,而具有C-s对称性的紧凑结构对于Cu-20则更可取。对于具有四面体结构的Au-20和Ag-20,存在较大的HOMO-LUMO缺口,而在具有四面体结构的Cu-20异构体中,该缺口很小。 Cu-20的致密C-s结构具有与具有四面体结构的Au-20相当的大间隙。 (C)2003 Elsevier B.V.保留所有权利。 [参考:35]

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