Optical vorticity from nontrivial Chern numbers enhances electron-impurity skew scattering in topological materials, yielding a ballistic photovoltaic current whose frequency scaling and tensor constraints depend on topological class, defect symmetry, and polarization.
The electronic properties of bilayer graphene
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abstract
We review the electronic properties of bilayer graphene, beginning with a description of the tight-binding model of bilayer graphene and the derivation of the effective Hamiltonian describing massive chiral quasiparticles in two parabolic bands at low energy. We take into account five tight-binding parameters of the Slonczewski-Weiss-McClure model of bulk graphite plus intra- and interlayer asymmetry between atomic sites which induce band gaps in the low-energy spectrum. The Hartree model of screening and band-gap opening due to interlayer asymmetry in the presence of external gates is presented. The tight-binding model is used to describe optical and transport properties including the integer quantum Hall effect, and we also discuss orbital magnetism, phonons and the influence of strain on electronic properties. We conclude with an overview of electronic interaction effects.
years
2026 2verdicts
UNVERDICTED 2representative citing papers
Critical current in electrically tunable moiré minibands scales directly with bandwidth, providing a universal electrical probe across graphene superlattices.
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Vortex-enhanced photovoltaic current in disordered topological materials
Optical vorticity from nontrivial Chern numbers enhances electron-impurity skew scattering in topological materials, yielding a ballistic photovoltaic current whose frequency scaling and tensor constraints depend on topological class, defect symmetry, and polarization.
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Bandwidth-Limited Critical Currents in Electrically Tunable Moir\'e Bands
Critical current in electrically tunable moiré minibands scales directly with bandwidth, providing a universal electrical probe across graphene superlattices.