Effect of periodic potential on exciton states in semiconductor carbon nanotubes

Roslyak, Oleksiy; Piryatinski, Andrei

doi:10.1016/j.chemphys.2016.05.025

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

Journal Article · Sat May 28 00:00:00 EDT 2016 · Chemical Physics

DOI:https://doi.org/10.1016/j.chemphys.2016.05.025· OSTI ID:1304721

Roslyak, Oleksiy ^[1]; Piryatinski, Andrei ^[2]

Fordham Univ., Bronx, NY (United States). Dept. of Physics and Engineering Physics
Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Theoretical Division

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.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Laboratory Directed Research and Development (LDRD) Program

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1304721

Report Number(s):: LA-UR-16-22272

Journal Information:: Chemical Physics, Journal Name: Chemical Physics; ISSN 0301-0104

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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

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