Understanding double-resonant Raman scattering in chiral carbon nanotubes: Diameter and energy dependence of the D mode

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autor(en): Herziger F, Vierck A, Laudenbach J, Maultzsch J
Zeitschrift: Physical Review B
Verlag: AMER PHYSICAL SOC
Jahr der Veröffentlichung: 2015
Band: 92
Heftnummer: 23
ISSN: 1098-0121


Abstract


We present a theoretical model to describe the double-resonant scattering process in arbitrary carbon nanotubes (CNTs). We use this approach to investigate the defect-induced D mode in CNTs and unravel the dependence of the D-mode frequency on the CNT diameter and on the energy of the resonant optical transition. Our approach is based on the symmetry of the hexagonal lattice and geometric considerations; hence the method is independent of the exact model that is chosen to describe the electronic band structure or the phonon dispersion. We finally clarify the diameter dependence of this Raman mode that has been under discussion in the past and demonstrate that, depending on the experimental conditions, in general two different dependencies can be measured. We also prove that CNTs with an arbitrary chiral index can exhibit a D mode in their Raman spectrum, in contrast to previous symmetry-based arguments. Furthermore, we give a direct quantification of the curvature-induced phonon frequency corrections of the D mode in CNTs with respect to graphite.



FAU-Autoren / FAU-Herausgeber

Maultzsch, Janina Prof. Dr.
Lehrstuhl für Experimentalphysik


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


Zitierweisen

APA:
Herziger, F., Vierck, A., Laudenbach, J., & Maultzsch, J. (2015). Understanding double-resonant Raman scattering in chiral carbon nanotubes: Diameter and energy dependence of the D mode. Physical Review B, 92(23). https://dx.doi.org/10.1103/PhysRevB.92.235409

MLA:
Herziger, Felix, et al. "Understanding double-resonant Raman scattering in chiral carbon nanotubes: Diameter and energy dependence of the D mode." Physical Review B 92.23 (2015).

BibTeX: 

Zuletzt aktualisiert 2018-10-08 um 22:59