  Using transport measurements, we investigate multicomponent quantum Hall (QH)
ferromagnetism in dual-gated rhombohedral trilayer graphene (r-TLG), in which
the real spin, orbital pseudospin and layer pseudospins of the lowest Landau
level form spontaneous ordering. We observe intermediate quantum Hall plateaus,
indicating a complete lifting of the degeneracy of the zeroth Landau level (LL)
in the hole-doped regime. In charge neutral r-TLG, the orbital degeneracy is
broken first, and the layer degeneracy is broken last and only the in presence
of an interlayer potential U. In the phase space of U and filling factor, we
observe an intriguing hexagon pattern, which is accounted for by a model based
on crossings between symmetry-broken LLs.
