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Article Dans Une Revue Physical Review B Année : 2021

Quantum transport in flat bands and super-metallicity

G. Bouzerar
D. Mayou
  • Fonction : Auteur

Résumé

Quantum physics in flat-band (FB) systems embodies a variety of exotic phenomenon and even counter intuitive features. The quantum transport in several graphene based compounds that exhibit a flat band and a tunable gap is investigated. Despite the localized nature of the FB states and a zero group velocity, a super-metallic (SM) phase at the FB energy is revealed. The SM phase is robust against the inelastic scattering strength and controlled only by the inter-band transitions between the FB and the dispersive bands. The SM phase appears insensitive and quasi independent of the gap amplitude and nature of the lattice (disordered or nano-patterned). The universal nature of the unconventional FB transport is illustrated with the case of electrons in the Lieb lattice.
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Dates et versions

hal-03011345 , version 1 (27-11-2020)

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G. Bouzerar, D. Mayou. Quantum transport in flat bands and super-metallicity. Physical Review B, 2021, 103 (7), pp.075415. ⟨10.1103/PhysRevB.103.075415⟩. ⟨hal-03011345⟩

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