Premium
Temperature dependence of exciton–phonon‐induced sidebands in arbitrary carbon nanotubes
Author(s) -
Bobkin Evgeny,
Malic Ermin
Publication year - 2011
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201100086
Subject(s) - phonon , exciton , carbon nanotube , coulomb , condensed matter physics , formalism (music) , spectral line , materials science , physics , molecular physics , quantum mechanics , nanotechnology , art , musical , visual arts , electron
We present a microscopic approach based on the many‐body density matrix formalism for the study of exciton–phonon‐induced features in absorption spectra of carbon nanotubes with an arbitrary chiral angle and diameter. The introduction of excitonic wave functions already containing the influence of the Coulomb interaction allows us to focus on the contribution of phonons. We observe the formation of pronounced sidebands on both sides of the zero‐phonon line. We study the behaviour of exemplary nanotubes belonging to the two semiconducting and one metallic family with respect to the spectral weight transfer from the zero‐phonon line to the exciton–phonon sidebands at different temperatures.