|Title||The structure of K3C60 and the mechanism of superconductivity.|
|Publication Type||Journal Article|
|Year of Publication||1991|
|Journal||Proc Natl Acad Sci U S A|
|Date Published||1991 Oct 15|
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.
|Alternate Journal||Proc. Natl. Acad. Sci. U.S.A.|
|PubMed Central ID||PMC52682|