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Thermoelectric Power of Graphite Acceptor Compounds

Published online by Cambridge University Press:  15 February 2011

Ko Sugihara
Ko Sugihara*
Affiliation:
Materials Research Laboratory, Matsushita Electric Industrial Co., Ltd., Moriguchi, Osaka 570, Japan
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Abstract

Temperature variations of the thermopower (TEP) of acceptor graphite intercalation compounds (GIC) are very different from that of pristine graphite. At low temperatures the TEP increases monotonically with T, then levels off above 150 K. This behavior is ascribed to the phonon drag effect. In the region where the TEP is nearly constant, phonon relaxation is mainly controlled by the Rayleigh scattering due to point defects or impurities. This process leads to T-independent phonon drag TEP. The importance of Rayleigh scattering is due to the large cross section diameter of the Fermi surface in GIC. At low temperatures where the boundary scattering becomes important, the TEP is proportional to T3 . Detailed calculations are carried out by solving the phonon-carrier coupled Boltzmann equation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 20: Symposium H – Intercalated Graphite , 1982 , 157
Copyright
Copyright © Materials Research Society 1983

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References

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