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Fermi velocity reduction in graphene due to enhanced vacuum fluctuations.
Escudero, F; Ardenghi, J S.
Afiliação
  • Escudero F; Departamento de Física, Universidad Nacional del Sur, Av. Alem 1253, B8000 Bahía Blanca, Argentina.
  • Ardenghi JS; Instituto de Física del Sur (IFISUR, UNS-CONICET), Av. Alem 1253, B8000 Bahía Blanca, Argentina.
J Phys Condens Matter ; 33(48)2021 Sep 23.
Article em En | MEDLINE | ID: mdl-34500446
It is well known that the confinement of matter inside a microcavity can significantly enhance the light-matter interactions. As a result the vacuum fluctuations, induced by virtual photons, can occur in a volume much lower than the free-space diffraction limit. In this work we show that, for a single doped graphene plane inside a microcavity, these enhanced vacuum interactions can produce a significant reduction in the Fermi velocity of the electrons. The effect arises because the energies of the photons are much larger than the energies of the electrons in graphene, which implies that the vacuum exchange interaction is repulsive around the Fermi level. Consequently the quasiparticle Fermi velocity decreases, in contrast with the enhancement obtained in Hartree-Fock. For THz cavities, the reduction is highly localized around the Fermi level, and is practically independent of the carrier density in graphene.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: J Phys Condens Matter Assunto da revista: BIOFISICA Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Argentina País de publicação: Reino Unido

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: J Phys Condens Matter Assunto da revista: BIOFISICA Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Argentina País de publicação: Reino Unido