%0 Journal Article
%T Structural and electronic properties of C72 and La2@C72<br>C72,La2@C72几何结构和电子性质的计算研究
%A Tang Chun-Mei
%A Yuan Yong-Bo
%A Deng Kai-Ming
%A Yang Jin-Long
%A <br>唐春梅
%A 袁勇波
%A 邓开明
%A 杨金龙
%J 物理学报
%D 2006
%I 
%X The geometric and electronic properties of the three isomers for C72 and La2@C72 have been studied using the generalized gradient approximation in density functional theory (DFT). It is found that C72(D6d) which satisfies the isolated-pentagon rule is the most stable structure among the three isomers of C72, while La2@C72 (#10611) is the most stable structure and La2@C72 (D6d) is the most unstable structure among the three isomers of La2@C72. It is also found from the analysis of energy levels as well as the density of states that the stability change is due to the mixing of La atomic orbital with C atomic orbital in C72. From Milliken populations, we find that there are about three electrons transferring from the two encaged La atoms to C72 cage so the electronic configuration of La2@C72 (#10611) can be described as La3+2@C3-72. We also come to the conclusion from the net spins of La as well as of La2@C72 that the magnetic moments of La have been completely quenched so La2@C72 (#10611) shows no magnetism.
%K C72
%K La2@C72
%K DFT
%K geometric structure
%K electronic structure<br>C72，
%K La2@C72，
%K 密度泛涵理论，
%K 几何结构，
%K 电子结构
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=7AD7D6CC1B2B8020&yid=37904DC365DD7266&vid=E514EE58E0E50ECF&iid=DF92D298D3FF1E6E&sid=F06621747E845543&eid=82925188A6CB81D2&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=29