Regensburg 2016 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 58: Transport: Poster Session
TT 58.40: Poster
Mittwoch, 9. März 2016, 15:00–18:30, Poster D
Gap engineering in strained carbon nanotubes with parallel magnetic field — •Lennart Korsten1, Thomas Stegmann1,2, and Nikodem Szpak1 — 1Fakultät für Physik, Universität Duisburg-Essen, Duisburg — 2Instituto de Ciencias Fisicas, Universidad Nacional Autonoma de Mexico, Cuernavaca
Strain and curvature in carbon nanotubes influence the distances and angles between the atomic orbitals. In the tight-binding description of electronic excitations, this leads to anisotropic tunneling amplitudes and to the shift of Dirac points in the energy dispersion relation. Since application of a parallel magnetic field can also move the Dirac points it can be used for opening or closing the energy gap as well as for precise measurements of the strain and curvature effects. We calculate these effects theoretically and simulate the electronic transmission numerically.