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.
@article{arxiv.1210.6592,
title = {Broken Symmetry Quantum Hall States in Dual Gated ABA Trilayer Graphene},
author = {Yongjin Lee and Jairo Velasco and David Tran and Fan Zhang and Wenzhong Bao and Lei Jing and Kevin Myhro and Dmitry Smirnov and Chun Ning Lau},
journal= {arXiv preprint arXiv:1210.6592},
year = {2017}
}