Fullerides of alkaline-earth metals.
Fullerides of alkaline-earth metals.
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碱土金属的富勒烯化物。
DOI：
10.1103/physrevb.45.8845
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
R. Smalley
中科院分区：
文献类型：
--
作者：
Yu Chen;F. Stepniak;J. Weaver;L. Chibante;R. Smalley
同步辐射光发射研究表明，Mg、Sr和Ba与${\mathrm{C}}_{60}$混合产生金属（Sr和Ba）和非金属（Mg）富勒化物。在所有情况下，富勒化物的形成导致占据费米能级附近的杂化带，这些杂化带是由碱土原子的${\mathrm{C}}_{60}$态和s态导出的。${\mathrm{Mg}}_{\mathit{x}}$${\mathrm{C}}_{60}$的非金属性质可能反映了电子相关效应，金属的${\mathrm{Sr}}_{\mathit{x}}$${\mathrm{C}}_{60}$和${\mathrm{Ba}}_{\mathit{x}}$${\mathrm{C}}_{60}$富勒化物是超导的候选者。
Synchrotron radiation photoemission studies show that the mixing of Mg, Sr, and Ba with ${\mathrm{C}}_{60}$ yields metallic (Sr and Ba) and nonmetallic (Mg) fullerides. In all cases, fulleride formation leads to the occupation of hybrid bands near the Fermi level that are derived from ${\mathrm{C}}_{60}$ states and the s states of the alkaline-earth atoms. The nonmetallic character of ${\mathrm{Mg}}_{\mathit{x}}$${\mathrm{C}}_{60}$ probably reflects electron correlation effects, and metallic ${\mathrm{Sr}}_{\mathit{x}}$${\mathrm{C}}_{60}$ and ${\mathrm{Ba}}_{\mathit{x}}$${\mathrm{C}}_{60}$ fullerides are candidates for superconductivity.