Elementary excitations in cylindrical tubules
- 15 March 1993
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 47 (11), 6617-6624
- https://doi.org/10.1103/physrevb.47.6617
Abstract
A detailed study of the elementary excitations of an electron gas confined to a tubule system is presented. The system could consist either of a single cylindrical tubule or of several tubules sharing a common axis. Graphene tubules with a radius as small as 11 Å have been recently realized. Essential features revealed from this study are expected to be common to the graphene tubules. The dielectric function of the quasi-one-dimensional (1D) tubular system has been evaluated exactly within the random-phase approximation, where both the intrasubband and the intersubband excitations are included. The angular momentum (L) is conserved in the tubule system. The excitations, e.g., plasmons, of different L’s are thus mutually decoupled. At any given L, only a small number of plasmon branches exist, every one of which can be studied systematically. Intertubule interaction for coaxial tubules has been included. The coupling among coaxial tubules adds unique features that distinguish the tubules from other quasi-1D systems.Keywords
This publication has 18 references indexed in Scilit:
- Screening of charged impurities in graphite intercalation compoundsPhysical Review B, 1992
- Elementary excitations in one-dimensional quantum wires: Exact equivalence between the random-phase approximation and the Tomonaga-Luttinger modelPhysical Review B, 1992
- Carbon fibers based onand their symmetryPhysical Review B, 1992
- Helical microtubules of graphitic carbonNature, 1991
- Fullerenes with metals insideThe Journal of Physical Chemistry, 1991
- Elementary excitation spectrum of one-dimensional electron systems in confined semiconductor structures: Zero magnetic fieldPhysical Review B, 1991
- Electron-electron interactions in quasi-one-dimensional electron systemsPhysical Review B, 1990
- Far-infrared response of one-dimensional electronic systems in single- and two-layered quantum wiresPhysical Review B, 1988
- Dielectric function and plasmon structure of stage-1 intercalated graphitePhysical Review B, 1986
- Screening and elementary excitations in narrow-channel semiconductor microstructuresPhysical Review B, 1985