Marganska, Magdalena and del Valle, Miriam and Jhang, Sung Ho and Strunk, Christoph and Grifoni, Milena (2011) Localization induced by magnetic fields in carbon nanotubes. Phys. Rev. B 83 (19), p. 193407.
The electronic spectra of long carbon nanotubes (CNTs) can, to a very good approximation, be obtained using the dispersion relation of graphene with both angular and axial periodic boundary conditions. In short CNTs one must account for the presence of open ends, which may give rise to states localized at the edges. When a magnetic field is applied parallel to the tube axis, it modifies both momentum quantization conditions, causing hitherto extended states to localize near the ends. We study analytically and numerically the appearance and evolution of this peculiar localization phenomenon in CNTs of any nonarmchair chirality, including the electron spin. Conductance calculations show different evolution of spin up and down states in increasing magnetic field.
|Institutions:|| Physics > Institute of Theroretical Physics > Chair Professor Grifoni > Group Milena Grifoni|
Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Christoph Strunk
|Projects:||GRK 1570, Elektronische Eigenschaften von Nanostrukturen auf Kohlenstoff-Basis|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||10 Jun 2011 10:49|
|Last Modified:||31 Aug 2011 09:24|