Landau-level splitting in graphene in high magnetic fields
Document Type
Article
Publication Date
4-14-2006
Abstract
The quantum Hall (QH) effect in two-dimensional electrons and holes in high quality graphene samples is studied in strong magnetic fields up to 45 T. QH plateaus at filling factors ν=0,±1,±4 are discovered at magnetic fields B> 20T, indicating the lifting of the fourfold degeneracy of the previously observed QH states at ν=±4(|n|+1/2), where n is the Landau-level index. In particular, the presence of the ν=0,±1 QH plateaus indicates that the Landau level at the charge neutral Dirac point splits into four sublevels, lifting sublattice and spin degeneracy. The QH effect at ν=±4 is investigated in a tilted magnetic field and can be attributed to lifting of the spin degeneracy of the n=1 Landau level. © 2006 The American Physical Society.
Publication Title
Physical Review Letters
Recommended Citation
Zhang, Y.,
Jiang, Z.,
Small, J.,
Purewal, M.,
Tan, Y.,
Fazlollahi, M.,
Chudow, J.,
Jaszczak, J.,
Stormer, H.,
&
Kim, P.
(2006).
Landau-level splitting in graphene in high magnetic fields.
Physical Review Letters,
96(13).
http://doi.org/10.1103/PhysRevLett.96.136806
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/10111