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Title: Effect of periodic potential on exciton states in semiconductor carbon nanotubes

Here we develop a theoretical background to treat exciton states in semiconductor single-walled carbon nanotubes (SWCNTs) in the presence of a periodic potential induced by a surface acoustic wave (SAW) propagating along SWCNT. The formalism accounts for the electronic band splitting into the Floquet subbands induced by the Bragg scattering on the SAW potential. Optical transitions between the Floquet states and correlated electron–hole pairs (excitons) are numerically examined. Formation of new van Hove singularities within the edges of Floquet sub-bands and associated transfer of the exciton oscillator strengths resulting in the photoluminescence quenching are predicted. The simulations demonstrate the exciton energy red Stark shift and reduction in the exciton binding energy. We provide comparison of our results with reported theoretical and experimental studies.
 [1] ;  [2]
  1. Fordham Univ., Bronx, NY (United States). Dept. of Physics and Engineering Physics
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Theoretical Division
Publication Date:
OSTI Identifier:
Report Number(s):
Journal ID: ISSN 0301-0104
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Chemical Physics
Additional Journal Information:
Journal Name: Chemical Physics; Journal ID: ISSN 0301-0104
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE Laboratory Directed Research and Development (LDRD) Program
Country of Publication:
United States
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 36 MATERIALS SCIENCE; Material Science; Semiconductor single-walled carbon nanotubes, surface acoustic waves, optical properties of excitons, light absorption, sonoluminescence