Magnetoplasmons and SU(4) symmetry in graphene

Abstract

We study magnetoplasmons or neutral collective excitations of graphene in a strong perpendicular magnetic field, which can be modelled as bound electron-hole pairs. The SU(4) symmetry of graphene arising from spin and valley pseudospin degrees of freedom is explored using Young diagrams to correctly predict the degeneracies of these excitations. The multiplet structure of the states is identical to that of mesons composed of first and second generation quarks.

arXiv comment5 pages, 4 figures, proceedings from Condensed Matter and Materials Physics conference 2010

References in corpus (9)

• The electronic properties of graphene
• Graphene: Status and Prospects
• Andreev reflection and Klein tunneling in graphene
• Colloquium: The transport properties of graphene: An introduction
• Electron interactions in graphene in a strong magnetic field
• Excitations from Filled Landau Levels in Graphene
• Localized Collective Excitations in Doped Graphene in Strong Magnetic Fields
• Symmetry Content and Observation of Charged Collective Excitations for Graphene in Strong Magnetic Fields
• Localised Magneto-Optical Collective Excitations of Impure Graphene

Cited by in corpus (4)

• Influence of Landau level mixing on the properties of elementary excitations in graphene in strong magnetic field
• Magnetoplasmons bound to short-range impurities in graphene: Symmetries and optics
• Density Matrix Renormalization Group simulations of the SU(N) Fermi-Hubbard chain implementing the full SU(N) symmetry via Semi-Standard Young Tableaux and Unitary Group Subduction Coefficients
• Ordered states in AB bilayer graphene in SU(4)-symmetric model