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- W3136113544 abstract "We numerically compute the density of states (DOS) of interacting disordered zigzag graphene nanoribbon (ZGNR) having midgap states showing $e/2$ fractional edge charges. The computed Hartree-Fock DOS is linear at the critical disorder strength where the gap vanishes. This implies an $Imbox{-}V$ curve of $Ipropto V^2$. Thus, $Imbox{-}V$ curve measurement may yield evidence of fractional charges in interacting disordered ZGNR. We show that even a weak disorder potential acts as a singular perturbation on zigzag edge electronic states, producing drastic changes in the energy spectrum. Spin-charge separation and fractional charges play a key role in the reconstruction of edge antiferromagnetism. Our results show that an interacting disordered ZGNR is a topologically ordered Mott-Anderson insulator." @default.
- W3136113544 created "2021-03-29" @default.
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- W3136113544 date "2020-04-29" @default.
- W3136113544 modified "2023-10-16" @default.
- W3136113544 title "Fractional edge charge of e/2 in interacting disordered graphene zigzag nanoribbon" @default.
- W3136113544 hasPublicationYear "2020" @default.
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