MnxSny(x=2,3,4;y=18,24,30)团簇几何结构的密度泛函研究
Density functional study on the geometric property of MnxSny(x 2, 3, 4; y 18, 24, 30)
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摘要: 采用密度泛函方法,研究了MnxSny(x=2,3,4;y=18,24,30)团簇的几何结构.发现MnxSn6x6(37=2,3,4)倾向于形成Mn原子内掺入DaaSn团簇单笼结构,即Mn2Snls,Mn3Sn24和Mn4Sn30.而MnxSn6x+12(x=2,3)则倾向于形成由两个小笼连接而成的双笼结构,即MnSnl2-MnSnl2和MnSnl2-Mn2Sn18.因此,可望通过控制掺杂Mn原子的数量来组装成不同结构的MnxSny维纳米线.Abstract: The geometric structures of the MnxSny (x = 2, 3, 4; y = 18, 24, 30) clusters are studied using the density functional theory method. The geometric optimization shows that the favourite structures of MnxSn6x+6 (z = 2, 3, 4) are D3a single-cage structures which encapsulate Mn atoms, i.e. MnxSnxs, MnaSn24 and Mn4Sn3o. However the favourite structures of MnxSn6+12 (z = 2, 3) are two-cage structures, i.e. MnSn12-MnSn12 and MnSn12-Mn2Snls. Mnx Sny heterostructures by controlling the number of Mn atoms. Thus, it is promising to form new one-dimensional nonawires of
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