Quasiparticle Properties of an Electron Gas in a Cylindrical Tubule

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概要

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• The self-energy of an electron gas confined to a cylindrical ttrbule is studied within the dynamicrandom phase approximation. As a result of the cylindrical symmetry, e;xeh subband is describedby the angular momentum (Z), and the excitation spectrurn by the transf'erred angular naornenturn(L) of the Coulomb interactions. All of the intrasubband (L = O) auad intersubband (L $ O)interactions are included in the self-energy. Quasiparticle energy and energy width exhibit themultiple divergent structures, mainly owing to the various plasunons. The contributions due tothe #L intersubband plasmons are the same for the l : O sulclcand, but not the same for thel / 0 subbands. Hence, there are more divergent structures in the self-energies of the l / Osubbands. The downshift of subband edge strongly depends on the carrier density, the tubularradius, and the effective mass. It exhibits cusps or jumps at certain carrier densities, where thesubband crossings occur. The special jurnps are related to a new L : O plasrnon.

• 1997-11-15

著者

• LIN Ming-Fa

  Physics Department,National Cheng Kung University

• SHUNG Kenneth

  Physics Department,National Tsing Hua University

• Lin Ming-fa

  Physics Department National Cheng Kung University

• Shung Kenneth

  Physics Department National Tsing Hua University

関連論文

• Quasiparticle Properties of an Electron Gas in a Cylindrical Tubule
• Optical and Magneto-Optical Properties of Carbon Nanotube Bundles

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