SU(4) symmetry breaking revealed by magneto-optical spectroscopy in epitaxial graphene
arXiv:1506.06680 · doi:10.1103/PhysRevB.91.235122
Abstract
Refined infrared magnetotransmission experiments have been performed in magnetic fields B up to 35 T on a series of multilayer epitaxial graphene samples. Following the main optical transition involving the n=0 Landau level (LL), we observe a new absorption transition increasing in intensity with magnetic fields B>26 T. Our analysis shows that this is a signature of the breaking of the SU(4) symmetry of the n=0 LL. Using a quantitative model, we show that the only symmetry-breaking scheme consistent with our experiments is a charge density wave (CDW).
References in corpus (25)
- Ultrathin epitaxial graphite: 2D electron gas properties and a route toward graphene-based nanoelectronics
- Born-Oppenheimer Breakdown in Graphene
- Electric Field Effect Tuning of Electron-Phonon Coupling in Graphene
- Kohn Anomalies and Electron-Phonon Interaction in Graphite
- Landau Level Splitting in Graphene in High Magnetic Fields
- Landau level spectroscopy of ultrathin graphite layers
- Spin and valley quantum Hall ferromagnetism in graphene
- Tunable symmetry breaking and helical edge transport in a graphene quantum spin Hall state
- Impact of the electron-electron correlation on phonon dispersions: failure of LDA and GGA functionals in graphene and graphite
- Interaction phenomena in graphene seen through quantum capacitance
- Phase diagram for the quantum Hall state in monolayer graphene
- Spontaneous parity breaking of graphene in the quantum Hall regime
- Theory of the Magnetic-Field-Induced Insulator in Neutral Graphene
- Interaction-induced shift of the cyclotron resonance of graphene using infrared spectroscopy
- Filling-Factor-Dependent Magnetophonon Resonance in Graphene
- Magnetoresistance measurements of Graphene at the Charge Neutrality Point
- Selective equilibration of spin and valley polarized quantum Hall edge states in graphene
- Magnetoplasmons excitations in graphene for filling factors
- Spin splitting in graphene studied by means of tilted magnetic-field experiments
- Fractional and integer quantum Hall effects in the zeroth Landau level in graphene
- Chiral Symmetry Breaking and the Quantum Hall Effect in Monolayer Graphene
- Broken SU(4) Symmetry and The Fractional Quantum Hall Effect in Graphene
- Enhanced Intervalley Scattering of Twisted Bilayer Graphene by Periodic AB Stacked Atoms
- Resonant Excitation of Graphene K-Phonon and Intra-Landau-Level Excitons in Magneto-Optical Spectroscopy
- In-plane Chiral Tunneling and Out-of-plane Valley-polarized Quantum Tunneling in Twisted Graphene Trilayer