Orbital Lamb shift and mixing of the pseudo-zero-mode Landau levels in ABC-stacked trilayer graphene

Abstract

In a magnetic field graphene trilayers support a characteristic multiplet of 12 zero(-energy)-mode Landau levels with a threefold degeneracy in Landau orbitals. It was earlier noted for bilayer graphene that Coulombic vacuum fluctuations, specific to graphene, lift the orbital degeneracy of such zero-energy modes and that these Lamb-shfted" orbital modes, with filling, get mixed via the Coulomb interaction. It is pointed out that analogous orbital Lamb shift and mixing of zero-mode levels can also take place, with an enriched symmetry content, in ABC-stacked trilayer graphene; and its consequences are discussed in the light of experimental results.

9 pages, 3 figures, revtex

References in corpus (19)

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• Phase diagram of insulating crystal and quantum Hall states in ABC-stacked trilayer graphene

Cited by in corpus (3)

• The Most General Form of Deformation of the Heisenberg Algebra from the Generalized Uncertainty Principle
• Interaction-enhanced electron-hole and valley asymmetries in the lowest Landau level of ABA-stacked trilayer graphene
• Orbital mixing in few-layer graphene and non-Abelian Berry phase