Excitonic Rayleigh scattering spectra of metallic single-walled carbon nanotubes

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autor(en): Malic E, Maultzsch J, Reich S, Knorr A
Zeitschrift: Physical Review B
Verlag: AMER PHYSICAL SOC
Jahr der Veröffentlichung: 2010
Band: 82
Heftnummer: 11
ISSN: 1098-0121


Abstract


We have performed microscopic calculations of the Rayleigh scattering cross section for arbitrary metallic single-walled carbon nanotubes. The focus of our investigations lies on excitonic effects and their influence on the characteristic features in a Rayleigh scattering spectrum. Our approach is based on density-matrix theory including tight-binding energies, the carrier-light coupling as well as the carrier-carrier interaction. Due to the refractive-index contribution to the scattering cross section, we observe characteristic features in Rayleigh spectra, such as a strong deviation from the Lorentz peak shape and the larger oscillator strength of the lower-lying transition M(ii)(-) in the double-peaked structure, independently of the chiral angle and the diameter of the investigated nanotubes. We observe excitonic binding energies in the range of 60-80 meV for metallic nanotubes with diameters of 1.5-2.5 nm. The overlap of the excitonic transition with the close-by continuum has a significant influence on the peak shape and a minor influence on the peak intensity ratios. The presented results are in good agreement with recent experimental data.



FAU-Autoren / FAU-Herausgeber

Maultzsch, Janina Prof. Dr.
Lehrstuhl für Experimentalphysik


Autor(en) der externen Einrichtung(en)
Freie Universität Berlin
Technische Universität Berlin


Zitierweisen

APA:
Malic, E., Maultzsch, J., Reich, S., & Knorr, A. (2010). Excitonic Rayleigh scattering spectra of metallic single-walled carbon nanotubes. Physical Review B, 82(11). https://dx.doi.org/10.1103/PhysRevB.82.115439

MLA:
Malic, Ermin, et al. "Excitonic Rayleigh scattering spectra of metallic single-walled carbon nanotubes." Physical Review B 82.11 (2010).

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Zuletzt aktualisiert 2018-08-08 um 05:16