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

K. Shizuya
Phys. Rev. B 87, 085413 – Published 7 February 2013

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-shifted” orbital modes, with filling, get mixed via the Coulomb interaction. It is pointed out that an 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.

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  • Received 12 November 2012

DOI:https://doi.org/10.1103/PhysRevB.87.085413

©2013 American Physical Society

Authors & Affiliations

K. Shizuya

  • Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Japan

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Vol. 87, Iss. 8 — 15 February 2013

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