Magnetic silicon fullerene

A metal-encapsulating silicon fullerene, Eu@Si-20, has been predicted by density functional theory to be by far the most stable fullerene-like silicon structure. The Eu@Si-20 structure is a dodecahedron with D-2h symmetry in which the europium atom occupies the center site. The calculated results show that the europium atom has a large magnetic moment of nearly 7.0 Bohr magnetons. In addition, it was found that a stable "pearl necklace" nanowire, constructed by concatenating a series of Eu@Si-20 units, with the central europium atom, retains the high spin moment. The magnetic structure of the nanowire indicates potential applications in the fields of spintronics and high-density magnetic storage.

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We would like to thank Professor S. S. Li, N. X. Chen and J. Shen for their helpful discussions and N. E. Davison for his help with the language. This work was supported by the National Basic Research Program of China (Grant No. 2006CB605101), the National Natural Science Foundation of China (Grant No. 10874039) and the Natural Science Foundation of Hebei Province (No. A2008000134).

国内

We would like to thank Professor S. S. Li, N. X. Chen and J. Shen for their helpful discussions and N. E. Davison for his help with the language. This work was supported by the National Basic Research Program of China (Grant No. 2006CB605101), the National Natural Science Foundation of China (Grant No. 10874039) and the Natural Science Foundation of Hebei Province (No. A2008000134).