Abstract
The effective-mass-approximation differential equations appropriate for impurities in a graphite host are constructed and are used to solve self-consistently for the screening response surrounding a single intercalant atom. The screening cloud is found to have a very slow algebraic decay with a characteristic length of 3.8 \AA{} in the case studied. This rather long length is due to both the semimetallic and the two-dimensional character of graphite. A Thomas-Fermi description of screening is found to be adequate, but a linear-response theory is not. From these results we conclude that the transferred charge in alkali-metal---graphite intercalation compounds is distributed nearly homogeneously on a carbon plane. We discuss recent theoretical and experimental work in light of these results.
Keywords
GraphiteIntercalation (chemistry)ImpurityMaterials scienceAlkali metalCharge (physics)Atom (system on chip)Effective mass (spring–mass system)Carbon fibersCondensed matter physicsGraphite intercalation compoundPhysicsQuantum mechanicsComposite number
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Publication Info
- Year
- 1984
- Type
- article
- Volume
- 29
- Issue
- 4
- Pages
- 1685-1694
- Citations
- 662
- Access
- Closed
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Cite This
David P. DiVincenzo,
E. J. Melé
(1984).
Self-consistent effective-mass theory for intralayer screening in graphite intercalation compounds.
Physical review. B, Condensed matter
, 29
(4)
, 1685-1694.
https://doi.org/10.1103/physrevb.29.1685
Identifiers
- DOI
- 10.1103/physrevb.29.1685