Broken Symmetry Quantum Hall States in Dual-Gated ABA Trilayer Graphene
Abstract
We present low temperature transport measurements on dual-gated suspended trilayer graphene in the quantum Hall (QH) regime. We observe QH plateaus at filling factors {\nu}=-8, -2, 2, 6, and 10, in agreement with the full-parameter tight binding calculations. In high magnetic fields, odd-integer plateaus are also resolved, indicating almost complete lifting of the 12-fold degeneracy of the lowest Landau levels (LL). Under an out-of-plane electric field E, we observe degeneracy breaking and transitions between QH plateaus. Interestingly, depending on its direction, E selectively breaks the LL degeneracies in the electron-doped or hole-doped regimes. Our results underscore the rich interaction-induced phenomena in trilayer graphene.
- Publication:
-
Nano Letters
- Pub Date:
- April 2013
- DOI:
- 10.1021/nl4000757
- arXiv:
- arXiv:1210.6592
- Bibcode:
- 2013NanoL..13.1627L
- Keywords:
-
- Condensed Matter - Mesoscale and Nanoscale Physics;
- Condensed Matter - Strongly Correlated Electrons
- E-Print:
- doi:10.1021/nl4000757