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Abstract
We explore the role of local, multi-orbital electron correlations in Bi2Se3 topological insulator. Based on local-density-approximation plus dynamical-mean-field-theory (LDA + DMFT) we derive a Kondo-Mott electronic transition, predicting maximally non-metallicity in three-dimensional Bi-chalcogenide topological insulators. Our results within the spin-orbit Kondo state show good agreement with scanning tunneling spectroscopy taken on pure and Cu-doped Bi2Se3 samples and effective mass enhancement of Dirac electrons for Cu x Bi2Se3, confirming the hypothesis of electron correlations in three-dimensional p-band topological insulators.
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