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Electronic and Lattice Modes of Graphite-Cocl2

Published online by Cambridge University Press:  15 February 2011

C.W. Lowe ,
C. Nicolini  and
G. Dresselhaus
C.W. Lowe
Affiliation:
Massachusetts Institute of Technology, Cambridge, MA 02139, USA
C. Nicolini
Affiliation:
Massachusetts Institute of Technology, Cambridge, MA 02139, USA
G. Dresselhaus
Affiliation:
Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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Abstract

Reflectivity measurements on graphite-CoCl2 intercalation compounds between 0.06 eV and 2.0 eV for stages 3 and 5 show sharp Drude edges and superimposed interband structure. Stage 5 shows structure near 0.4 eV and 0.55 eV while stage 5 shows structure between 0.12 eV and 0.55 eV. The observed number of interband transitions is equal to the stage index which is consistent with a recently proposed kz-axis zone-folding model of the electronic energy bands. In addition to the electronic optical transitions, features associated with lattice vibrations are observed in the spectra. In particular, the graphite-like IR mode near 1580 cm–1 is clearly resolved in the intercalation compounds. A reflectivity minimum and splitting of this vibrational mode is observed for both stages 3 and 5 of graphite-CoCl2.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 20: Symposium H – Intercalated Graphite , 1982 , 93
Copyright
Copyright © Materials Research Society 1983

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References

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