Propagative Landau states and Fermi level pinning in carbon nanotubes.
We present strong evidence of Landau states formation in multiwalled carbon nanotubes with metallic or semiconducting outer shells, under magnetic fields as high as 60 T. Magnetoconductance data are found to converge to a gate-independent value for semiconducting shells, whereas for metallic shells, the Landau states introduce a strong reintroduction of backscattering and Fermi level pinning close to the charge neutrality point. Electronic band structure and transport calculations provide a consistent interpretation of the experimental data.
Nanot
Sébastien
S
Laboratoire National des Champs Magnétiques Intenses, INSA UPS CNRS, UPR 3228, Université de Toulouse, 143 avenue de rangueil, 31400 Toulouse, France.
Avriller
Rémi
R
Escoffier
Walter
W
Broto
Jean-Marc
JM
Roche
Stephan
S
Raquet
Bertrand
B