Hartwigsen, C.; Witschel, Wolfgang; Spohr, Eckhard:
Charge density and charge transfer in stage-1 alkali-graphite intercalation compounds
In: Physical Review B : Condensed matter and materials physics, Jg. 55 (1997), Heft 8, S. 4953 - 4959
1997Artikel/Aufsatz in Zeitschrift
ChemieFakultät für Chemie
Damit verbunden: 1 Publikation(en)
Titel:
Charge density and charge transfer in stage-1 alkali-graphite intercalation compounds
Autor*in:
Hartwigsen, C.;Witschel, Wolfgang;Spohr, EckhardUDE
GND
143257005
LSF ID
49123
ORCID
0000-0001-8148-7575ORCID iD
Sonstiges
der Hochschule zugeordnete*r Autor*in
Erscheinungsjahr:
1997

Abstract:

First-principles electronic structure calculations are carried out for the stage-1 alkali graphite intercalation compounds LiC6 and XC8 (X=Li, Na, K, Rb, and Cs). We analyze the charge densities and the differences to the reference charge densities of graphite host and intercalant sublattice. For the alkali metals Na, K, Rb, and Cs the computed charge transfer is nearly constant at a value of 0.7 elementary charges (e); values of 0.5e and 0.4e are found for the Li compounds LiC6 and LiC8, respectively. It is shown that the main fraction, about 0.4e, of the charge transfer is a geometrical consequence of the simple overlap of the charge densities of the graphite and intercalant sublattices.