Interaction-enhanced electron-hole and valley asymmetries in the lowest Landau level of ABA-stacked trilayer graphene
arXiv:1404.1603 · doi:10.1103/PhysRevB.89.165403
Abstract
In a magnetic field graphene trilayers support a special multiplet of 12 zero(-energy)-mode Landau levels with a threefold degeneracy in Landau orbitals. A close look is made into such zero-mode levels in ABA-stacked trilayers, with the Coulomb interaction taken into account. It turns out that the zero-mode Landau levels of ABA trilayers are greatly afflicted with electron-hole and valley asymmetries, which come from general hopping parameters and which are enhanced by the Coulomb interaction and the associated vacuum effect, the orbital Lamb shift, that lifts the zero-mode degeneracy. These asymmetries substantially affect the way the zero-mode levels evolve, with filling, via Coulomb interactions; and its consequences are discussed in the light of experiments.
10 pages, 4 figures, revtex
References in corpus (18)
- Biased bilayer graphene: semiconductor with a gap tunable by electric field effect
- Asymmetry gap in the electronic band structure of bilayer graphene
- Electronic states and Landau levels in graphene stacks
- Infrared spectroscopy of Landau levels in graphene
- Band Structure of ABC-Stacked Graphene Trilayers
- Electronic properties of bilayer and multilayer graphene
- Quantum Hall effect and Landau level crossing of Dirac fermions in trilayer graphene
- Orbital diamagnetism in multilayer graphenes: Systematic study with the effective mass approximation
- Quantum Anomalous Hall State in Bilayer Graphene
- Gate-induced interlayer asymmetry in ABA-stacked trilayer graphene
- Intra-Landau level Cyclotron Resonance in Bilayer Graphene
- Excitations from Filled Landau Levels in Graphene
- Magnetoplasmons excitations in graphene for filling factors
- Pseudo-zero-mode Landau levels and collective excitations in bilayer graphene
- Electron-electron interactions in graphene bilayers
- Electromagnetic response and pseudo-zero-mode Landau levels of bilayer graphene in a magnetic field
- Structure and the Lamb-shift-like quantum splitting of the pseudo-zero-mode Landau levels in bilayer graphene
- Orbital Lamb shift and mixing of the pseudo-zero-mode Landau levels in ABC-stacked trilayer graphene