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024 7 _ |a 10.1103/PhysRevB.81.054513
|2 DOI
024 7 _ |a WOS:000274998000110
|2 WOS
024 7 _ |a 2128/10962
|2 Handle
037 _ _ |a PreJuSER-12049
041 _ _ |a eng
082 _ _ |a 530
084 _ _ |2 WoS
|a Physics, Condensed Matter
100 1 _ |0 P:(DE-HGF)0
|a Ishida, H.
|b 0
245 _ _ |a Fermi-liquid, non-Fermi-liquid, and Mott phases in iron pnictides and cuprates
260 _ _ |a College Park, Md.
|b APS
|c 2010
300 _ _ |a 054513
336 7 _ |a Journal Article
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336 7 _ |a Journal Article
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336 7 _ |a ARTICLE
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336 7 _ |a JOURNAL_ARTICLE
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336 7 _ |a article
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440 _ 0 |0 4919
|a Physical Review B
|v 81
|x 1098-0121
|y 5
500 _ _ |a A. L. would like to thank Igor Mazin, Luca de' Medici, and Massimo Capone for comments. The work of H. I. is supported by the Grant-in-Aid for Scientific Research (Grant No. 20540191) and by the Nihon University Strategic Projects for Academic Research. A.L.'s calculations were carried out on the Julich Jump computer.
520 _ _ |a The role of Coulomb correlations in the iron pnictide LaFeAsO is studied by generalizing exact diagonalization dynamical mean-field theory to five orbitals. For rotationally invariant Hund's rule coupling a transition from a paramagnetic Fermi-liquid phase to a non-Fermi-liquid metallic phase exhibiting frozen moments is found at moderate Coulomb energies. For Ising-like exchange, this transition occurs at a considerably lower critical Coulomb energy. The correlation-induced scattering rate as a function of doping relative to half filling, i.e., delta=n/5 - 1, where n=6 for the undoped material, is shown to be qualitatively similar to the one in the two-dimensional single-band Hubbard model which is commonly used to study strong correlations in high-T-c cuprates. In this scenario, the parent Mott insulator of LaFeAsO is the half-filled n=5 limit, while the undoped n=6 material corresponds to the critical doping region delta(c) approximate to 0.2 in the cuprates, on the verge between the Fermi-liquid phase of the overdoped region and the non-Fermi-liquid pseudogap phase in the underdoped region.
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773 1 8 |a 10.1103/physrevb.81.054513
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773 _ _ |a 10.1103/PhysRevB.81.054513
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856 7 _ |u http://dx.doi.org/10.1103/PhysRevB.81.054513
856 4 _ |u https://juser.fz-juelich.de/record/12049/files/PhysRevB.81.054513.pdf
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