Theory of unconventional quantum Hall effect in strained graphene

Abstract

We show through both theoretical arguments and numerical calculations that graphene discerns an unconventional sequence of quantized Hall conductivity, when subject to both magnetic fields (B) and strain. The latter produces time-reversal symmetric pseudo/axial magnetic fields (b). The single-electron spectrum is composed of two interpenetrating sets of Landau levels (LLs), located at $\pm \sqrt{2n|b\pm B|}$, $n=0,1,2,\cdots$. For $b>B$, these two sets of LLs have opposite \emph{chiralities}, resulting in {\em oscillating} Hall conductivity between 0 and $\mp 2e^2/h$ in electron and hole doped system, respectively, as the chemical potential is tuned in the vicinity of the neutrality point. The electron-electron interactions stabilize various correlated ground states, e.g., spin-polarized, quantum spin-Hall insulators at and near the neutrality point, and possibly the anomalous Hall insulating phase at incommensurate filling $\sim B$. Such broken-symmetry ground states have similarities as well as significant differences from their counterparts in the absence of strain. For realistic strength of magnetic fields and interactions, we present scaling of the interaction-induced gap for various Hall states within the zeroth Landau level.

5 pages and 2 figures + supplementary (3.5 pages and 5 figures); Published version, cosmetic changes and updated references

References in corpus (8)

• Landau Level Splitting in Graphene in High Magnetic Fields
• Topological Mott Insulators
• Theory of interacting electrons on the honeycomb lattice
• Theory of integer quantum Hall effect in graphene
• Unconventional superconductivity on honeycomb lattice: the theory of Kekule order parameter
• Pseudo-magnetic catalysis of the time-reversal symmetry breaking in graphene
• Quantum critical scaling in magnetic field near the Dirac point in graphene
• Quantum Hall States in Graphene from Strain-Induced Nonuniform Magnetic Fields

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