On the Existence of Designer Magnetic Superatoms

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• 作者：Xinxing Zhang ; Yi Wang ; Haopeng Wang ; Alane Lim ; Gerd Gantefoer ; Kit H. Bowen ; J. Ulises Reveles ; Shiv N. Khanna
• 刊名：The Journal of the American Chemical Society
• 出版年：2013
• 出版时间：March 27, 2013
• 年：2013
• 卷：135
• 期：12
• 页码：4856-4861
• 全文大小：383K
• 年卷期：v.135,no.12(March 27, 2013)
• ISSN：1520-5126

文摘

The quantum states in small, compact metal clusters are bunched into electronic shells with electronic orbitals resembling those in atoms, enabling classification of stable clusters as superatoms. The filling of superatomic orbitals, however, does not generally follow Hund鈥檚 rule, and it has been proposed that magnetic superatoms can be stabilized by doping simple metal clusters with magnetic atoms. Here, we present evidence of the existence of a magnetic superatom and the determination of its spin moment. Our approach combines first principles studies with negative ion photoelectron experiments and enables a unique identification of the ground state and spin multiplicity. The studies indicate VNa₈ to be a magnetic superatom with a filled d-subshell and a magnetic moment of 5.0 渭_B. Its low electron affinity is consistent with filled subshell and enhanced stability. The synthesis of this species opens the pathway to investigate the spin-dependent electronics of the new magnetic motifs.