Regensburg 2010 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 29: TR: Nanoelectronics I: Quantum Dots, Wires, Point Contacts 1
TT 29.6: Vortrag
Donnerstag, 25. März 2010, 10:45–11:00, H19
Symmetry of the scattering states in defected metallic carbon nanotubes — •Leonhard Mayrhofer1 and Dario Bercioux2 — 1Fraunhofer IWM, Wöhlerstraße 11, D-79108 Freiburg, Germany — 2Freiburg Institute for Advanced Studies, Albert-Ludwigs-Universität, D-79104 Freiburg, Germany
In the last decade, several STM experiments [1-3] on metallic carbon nanotubes have given the opportunity to study the properties of scattering states induced by tube ending and local defects. Of particular interest is the possibility of reconstructing the electronic spectrum via Fourier analysis. The experimental results show a lack of the electronic branches depending of the tube chirality and the nature of the defect. We have performed an in depth analysis of the properties of the scattering states as a function of the symmetry properties of single- and double-vacancy defects. Our results are based on the comparison of a numerically exact tight-binding procedure with an analysis of the carbon nanotube symmetry groups.
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