Lifetime effects in low-stage intercalated graphite systems

Journal Article · Tue Jul 15 04:00:00 EDT 1986 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.34.1264· OSTI ID:5458756

Shung, K W.h.

Based upon a superlattice model for graphite intercalated compounds (GIC's), we present in this paper a detailed calculation of the lifetime of a conduction electron in a stage-1, acceptor-type GIC. Both intraband and interband processes, as well as intervalley processes, are included in this calculation. We find that it is very important to include the dynamic screening in the scheme, because the Coulomb interaction can generate plasmons that provide an efficient way for electrons to decay. The calculated electronic lifetime is then applied to the examination of the broad edge structure found in optically induced interband transitions. There, only partial success is found, possibly because of inaccurate determination of the Fermi energy. Improvements of our present calculation are suggested.

• Research Organization: Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831; Department of Physics, University of Tennessee, Knoxville, Tennessee 37916
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5458756
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 34:2; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
CARBON
CLATHRATES
COULOMB FIELD
ELECTRIC CONDUCTIVITY
ELECTRIC FIELDS
ELECTRICAL PROPERTIES
ELECTRONIC STRUCTURE
ELECTRONS
ELEMENTAL MINERALS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY LEVELS
FERMI LEVEL
FERMIONS
GRAPHITE
LEPTONS
LIFETIME
MINERALS
NONMETALS
PERMITTIVITY
PHYSICAL PROPERTIES
PLASMONS
QUASI PARTICLES
SCREENING
SUPERLATTICES