Magnetic response of certain curved graphitic geometries

The quasi-particle energy spectra associated with some members of buckyfamily (curved graphitic geometries), in particular C 50, C 60, C 70 and related fullerenes as well as coaxial helical microtubules of graphite, are obtained analytically within the mean-field approximation. These energy spectra...

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Bibliographic Details
Published inSynthetic metals Vol. 56; no. 2; pp. 3008 - 3013
Main Authors Wang, L., Davids, P.S., Saxena, A., Bishop, A.R.
Format Journal Article Conference Proceeding
LanguageEnglish
Published Lausanne Elsevier B.V 05.04.1993
Amsterdam Elsevier Science
New York, NY
Subjects
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electron states
Exact sciences and technology
Other topics in electron states
Physics
Electron specific heat
Fullerenes
Electronic structure
Magnetization
Fermi level
Magnetic susceptibility
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Summary:The quasi-particle energy spectra associated with some members of buckyfamily (curved graphitic geometries), in particular C 50, C 60, C 70 and related fullerenes as well as coaxial helical microtubules of graphite, are obtained analytically within the mean-field approximation. These energy spectra are then used to calculate various response functions. Specifically, we calculate the specific heat, magnetization and magnetic susceptibility in the presence of an external magnetic field at low temperatures. For a single microtubule an extra peak superimposed on the first de Haas van Alphen (dHvA) oscillation in magnetic susceptibility is found in the 50 – 170 Tesla range depending on the radius which is possibly accessible in special (explosive flux compression) experiments. Finally, we point to important potential applications of these novel mesoscopic structures in nanotechnology.
ISSN:0379-6779
1879-3290
DOI:10.1016/0379-6779(93)90071-4