Secondary electron interference from trigonal warping in clean carbon nanotubes
Mesoscale and Nanoscale Physics
2016-10-13 v3
Abstract
We investigate Fabry-Perot interference in an ultraclean carbon nanotube resonator. The conductance shows a clear superstructure superimposed onto conventional Fabry-Perot oscillations. A sliding average over the fast oscillations reveals a characteristic slow modulation of the conductance as a function of the gate voltage. We identify the origin of this secondary interference in intervalley and intravalley backscattering processes which involve wave vectors of different magnitude, reflecting the trigonal warping of the Dirac cones. As a consequence, the analysis of the secondary interference pattern allows us to estimate the chiral angle of the carbon nanotube.
Keywords
Cite
@article{arxiv.1602.03866,
title = {Secondary electron interference from trigonal warping in clean carbon nanotubes},
author = {A. Dirnaichner and M. del Valle and K. J. G. Götz and F. J. Schupp and N. Paradiso and M. Grifoni and Ch. Strunk and A. K. Hüttel},
journal= {arXiv preprint arXiv:1602.03866},
year = {2016}
}
Comments
5 pages, 3 figures; supplementary information: 10 pages, 10 figures