Isotope Effect Exponent in Rb₃C₆₀ Fuller ides

D. R. Yadav¹ , S. Shah² , N. Dagaonkar³ , Nishchhal Yadav⁴ , S. K. Ghosh⁵

Section:Research Paper, Product Type: Isroset-Conference
Vol.3 , Issue.1 , pp.15-18, Jan-2015

Online published on Feb 28, 2015

Copyright © D. R. Yadav, S. Shah, N. Dagaonkar, Nishchhal Yadav , S. K. Ghosh . This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
 

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Abstract :
The studies of the superconducting properties of fullerenes are briefly reviewed. The calculations are compared with coupling constants deduced from a number of different experimental techniques. Estimates of the Coulomb pseudo potential µ* and isotope exponent α describing the effect of the Coulomb repulsion on the superconductivity, as well as possible electronic mechanisms for the superconductivity, are reviewed. The influence of inter and intramolecular phonons on the nature of pairing mechanism and the superconducting state parameters of alkali metal intercalated fullerenes is investigated using the strong coupling theory. It is shown that the electrons in the unfilled band of C₆₀ develops due to intercalation of alkali metal distort the Rb₃C₆₀ lattice and yield low energy intermolecular vibrations. The incorporation of the intramolecular phonons in the transition temperature enhances to about 33 K.

Key-Words / Index Term :
Inter and Intramolecular Phonons, Fullerenes, Coulomb Pseudo potential, Transition temperature

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