Competition between magnetic field dependent band structure and coherent backscattering in multiwall carbon nanotubes

Details Competition between magnetic field dependent band structure and coherent backscattering in multiwall carbon nanotubes Competition between magnetic field dependent band structure and coherent backscattering in multiwall carbon nanotubes

2006-07-03

arxiv.org/abs/cond-mat/0607034v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 figures, 5 pages

Scientific paper

10.1088/1367-2630/9/3/056

Magnetotransport measurements in large diameter multiwall carbon nanotubes (20-40 nm) demonstrate the competition of a magnetic-field dependent bandstructure and Altshuler-Aronov-Spivak oscillations. By means of an efficient capacitive coupling to a backgate electrode, the magnetoconductance oscillations are explored as a function of Fermi level shift. Changing the magnetic field orientation with respect to the tube axis and by ensemble averaging, allows to identify the contributions of different Aharonov-Bohm phases. The results are in qualitative agreement with numerical calculations of the band structure and the conductance.

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