title: Multicomponent Quantum Hall Ferromagnetism and Landau Level Crossing in Rhombohedral Trilayer Graphene.
abstract: 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 QH 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 in the presence of an interlayer potential U⊥. In the phase space of U⊥ and filling factor ν, we observe an intriguing "hexagon" pattern, which is accounted for by a model based on crossings between symmetry-broken LLs.
authors.affiliation: Department of Physics and Astronomy, University of California, Riverside , Riverside, California 91765, United States.
authors.forename: Y
authors.initials: Y
authors.lastname: Lee
authors.affiliation: Department of Physics and Astronomy, University of California, Riverside , Riverside, California 91765, United States.
authors.forename: D
authors.initials: D
authors.lastname: Tran
authors.affiliation: Department of Physics and Astronomy, University of California, Riverside , Riverside, California 91765, United States.
authors.forename: K
authors.initials: K
authors.lastname: Myhro
authors.affiliation: Department of Physics and Astronomy, University of California, Riverside , Riverside, California 91765, United States.
authors.forename: J
authors.initials: J
authors.lastname: Velasco
authors.affiliation: Department of Physics and Astronomy, University of California, Riverside , Riverside, California 91765, United States.
authors.forename: N
authors.initials: N
authors.lastname: Gillgren
authors.affiliation: National High Magnetic Field Laboratory , Tallahassee, Florida 32310, United States.
authors.forename: J M
authors.initials: JM
authors.lastname: Poumirol
authors.affiliation: National High Magnetic Field Laboratory , Tallahassee, Florida 32310, United States.
authors.forename: D
authors.initials: D
authors.lastname: Smirnov
authors.affiliation: Department of Physics and Astronomy, University of California, Riverside , Riverside, California 91765, United States.
authors.forename: Y
authors.initials: Y
authors.lastname: Barlas
authors.affiliation: Department of Physics and Astronomy, University of California, Riverside , Riverside, California 91765, United States.
authors.forename: C N
authors.initials: CN
authors.lastname: Lau
keywords: Landau level crossing; Quantum Hall ferromagnetism; graphene; rhombohedral stacking; trilayer