Metal-insulator crossover and massive Dirac fermions in electron-doped FeTe

Craco, L.; Xu, Bingbing; Fang, Minghu; Freelon, B.

doi:10.1103/physrevb.101.165107

Cited by 4 publications

(1 citation statement)

References 76 publications

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“…Similar to the self-energy behavior in Fig. 3, sublinear energy dependence was also found in tetragonal and pseudohexagonal FeSe [27] as well as in electron doped FeTe [31], suggesting a common scenario of orbital-selective marginal Fermi liquidness in stoichiometric Fe-based superconductors. Finally, since in DMFT the self energy is momentum independent, the quasiparticle residue Z a of an orbital a, which defines the renormalized Fermi energy, directly yields the effective electron mass enhancement:…”

Section: Resultssupporting

confidence: 75%

Orbital-selective nature of the 3d electronic structure of the ThFeAsN superconductor

Craco

Leoni

2021

Phys. Rev. B

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Based on local-density approximation plus dynamical mean-field theory (LDA + DMFT) calculations, we perform a comprehensive analysis of electronic structure reconstruction of the ThFeAsN superconductor, showing how the normal and s wave superconducting spectra are reshaped by many-particle electron-electron interactions. Here, the ThFeAsN parent compound is described as an orbital-selective marginal Fermi liquid metal, with coexisting Fermi liquid quasiparticles and pseudogapped electronic states. Upon electron doping, an additional Kondo insulating state is predicted to exist in this system. Furthermore, we show how dynamical correlations strongly renormalize the bare Bogoliubov quasiparticles in the s wave superconducting state into totally correlated lineshapes. These findings contribute to the microscopic understanding of the role played by dynamical multiorbital electronic correlations in the low energy spectrum relevant to unconventional Fe-based superconductors.

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Section: Resultssupporting

confidence: 75%

Orbital-selective nature of the 3d electronic structure of the ThFeAsN superconductor

Craco

Leoni

2021

Phys. Rev. B

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Electrical and Magnetic Properties for Bulk FeSe and FeSe0.5Te0.5 Superconductors

Zhang

Ming

et al. 2021

Journal of Elec Materi

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Normal-state correlated electronic structure of the tetragonal TlNi2Se2 superconductor

Craco

Leoni

2023

Phys. Rev. B

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On the basis of density functional plus dynamical mean-field theory calculations we explore the electronic structure of the TlNi 2 Se 2 superconductor, showing how the normal-state spectra are reshaped by dynamical many-particle interactions. Upon electron-doping the 3d 8 Fermi liquid metal, hidden orbital selectivity with coexisting Mott localized, pseudogapped, and narrow Kondo-quasiparticle electronic excitations is predicted for TlNi 2 Se 2 . By specifically focusing on the energy spectrum that is relevant to the mixed-valence heavy-electron normal state of unconventional superconductors, our findings have the potential to enhance our microscopic understanding of the intricate interplay between many-particle physics and electron band filling, paving the way for further advancements.

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Metal-insulator crossover and massive Dirac fermions in electron-doped FeTe

Cited by 4 publications

References 76 publications

Orbital-selective nature of the 3d electronic structure of the ThFeAsN superconductor

Orbital-selective nature of the 3d electronic structure of the ThFeAsN superconductor

Electrical and Magnetic Properties for Bulk FeSe and FeSe0.5Te0.5 Superconductors

Normal-state correlated electronic structure of the tetragonal TlNi2Se2 superconductor

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