Accession Number : ADA291942

Title :   Theoretical Investigation of Superconductivity in Doped Fullerenes.

Descriptive Note : Final rept.,

Corporate Author : CALIFORNIA INST OF TECH PASADENA

Personal Author(s) : Jishi, Radi A.

PDF Url : ADA291942

Report Date : MAR 1995

Pagination or Media Count : 5

Abstract : The aim of the research we are conducting is to understand the phenomenon of superconductivity in the fullerene system. Towards achieving this goal we have conducted a series of studies and have published several papers quite recently. We have developed a force-constant model for the C60 molecule which accounts for all measured frequencies in C60. The model employs four bond-stretching and four angle-bending force constants that were doped to reproduce the correct values of the frequencies of the Raman-active vibrational modes. The model was successfully applied to higher fullerenes, such as C70 and the effect of doping by alkali metal atoms on the phonon modes in C60 and in C70 was considered. The study of the phonon spectrum in doped C60 and doped C70 is an important step in view of the fact that while doped C60 is superconducting, doped C70 is not. The studies we have carried out, combined with studies on the electronic states in doped C70, could elucidate the difference in the electrical properties between these two materials. jg p.2

Descriptors :   *FULLERENES, *CARBON, *DOPING, *SUPERCONDUCTIVITY, FREQUENCY, VIBRATION, MOLECULES, ATOMS, ELECTRICAL PROPERTIES, SPECTRA, ELECTRONIC STATES, PHONONS, ALKALI METALS.

Subject Categories : Inorganic Chemistry
      Physical Chemistry
      Electricity and Magnetism
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE