Broken Symmetry Quantum Hall states in Dual Gated ABA Trilayer Graphene

We perform 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, oddinteger 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$\bot $. We observe degeneracy~breaking and transitions between QH plateaus. Interestingly, depending on its direction, E$\bot $selectively breaks the LL degeneracies in the electron-doped or hole-doped regimes.~