K3C60的结构与超导机制。
The structure of K3C60 and the mechanism of superconductivity.
作者信息
Pauling L
机构信息
Linus Pauling Institute of Science and Medicine, Palo Alto, CA 94306-2025, USA.
出版信息
Proc Natl Acad Sci U S A. 1991 Oct 15;88(20):9208-9. doi: 10.1073/pnas.88.20.9208.
Analysis of the interatomic distances in the superconducting substance K3C60 indicates that each of the K atoms in tetrahedral interstices between C60 spheres accepts three electrons from C60, thus becoming quadricovalent; its four bonds resonate among the 24 adjacent carbon atoms to give a strong framework in which the negative charges are localized on these K atoms. The electric current is carried by the motion of positive charges (holes) through the network of C60 spheres and the K atoms in octahedral holes. Superconductivity is favored by the localization of the negative charges on the tetrahedral K atoms and their noninvolvement in valence-bond resonance, decreasing the rate of mutual extinction of electrons and holes.
对超导物质K3C60中原子间距离的分析表明，C60球体之间四面体间隙中的每个K原子从C60接受三个电子，从而变成四价；其四个键在24个相邻碳原子之间共振，形成一个强大的框架，负电荷定域在这些K原子上。电流由正电荷（空穴）通过C60球体网络和八面体孔中的K原子运动来承载。负电荷定域在四面体K原子上且不参与价键共振，降低了电子和空穴相互湮灭的速率，这有利于超导性。
Zotero 插件