Iron-Based Layered Superconductor:  LaOFeP

Kamihara, Yoichi; Hiramatsu, Hidenori; Hirano, Masahiro; Kawamura, Ryota; Yanagi, Hiroshi; Kamiya, Toshio; Hosono, Hideo

doi:10.1021/ja063355c

Cited by 1,407 publications

(1,172 citation statements)

References 37 publications

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“…[76]). In some systems, like LiFeAs [73] and LaFePO [77], superconductivity emerges already at zero doping, instead of a magnetic order. magnetism, the electronic structure, the normal state properties of FeSCs, and the interplay between FeSCs and cuprate superconductors have been reviewed in several recent publications [78,79,80,81,82,83,84,85,86,87,88,89,90,91].…”

Section: Superconductivity In Fe-pnictidesmentioning

confidence: 99%

Superconductivity from repulsive interaction

Maiti¹,

Chubukov²

2014

Novel Superfluids

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Abstract. The BCS theory of superconductivity named electron-phonon interaction as a glue that overcomes Coulomb repulsion and binds fermions into pairs which then condense and super-conduct. We review recent and not so recent works aiming to understand whether a nominally repulsive Coulomb interaction can by itself give rise to a superconductivity. We first discuss a generic scenario of the pairing by electron-electron interaction, put forward by Kohn and Luttinger back in 1965, and then turn to modern studies of the electronic mechanism of superconductivity in the lattice models for the cuprates, the Fe-pnictides, and the doped graphene. We show that the pairing in all three classes of materials can be viewed as lattice version of Kohn-Luttinger physics, despite that the pairing symmetries are different. We discuss under what conditions the pairing occurs and rationalize the need to do parquet renormalization-group analysis. We also discuss the interplay between superconductivity and density-wave instabilities.

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Section: Superconductivity In Fe-pnictidesmentioning

confidence: 99%

Superconductivity from repulsive interaction

Maiti¹,

Chubukov²

2014

Novel Superfluids

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“…8,9 For LaOFeAs, calculations were carried out almost simultaneously in a number of works. [10][11][12][13][14] The Fermi surface topology and band structure are rather similar for the 11 (e.g.…”

Section: Introductionmentioning

confidence: 99%

Temperature and doping dependence of normal state spectral properties in a two-orbital model for ferropnictides

et al. 2016

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Using a second-order perturbative Green's functions approach we determined the normal state spectral function A( k, ω) employing a minimal model for ferropnictides. Used before to study magnetic fluctuations and superconducting properties, it includes the two effective bands related to Fe-3d orbitals proposed by S. Raghu et al. [Phys. Rev. B 77, 220503 (R) (2008)], and local intra-and inter-orbital correlations for the effective orbitals. Here, we focus on the normal state electronic properties, in particular the temperature and doping dependence of the total density of states, A(ω), and of A( k, ω) in different Brillouin zone regions, comparing them with existing angle resolved photoemission spectroscopy (ARPES) and theoretical results. We obtain an asymmetric effect of electron and hole doping, quantitative agreement with the experimental chemical potential shifts, as well as spectral weight redistributions near the Fermi level with temperature consistent with the available experiments. In addition, we predict a non-trivial dependence of A(ω) with temperature, exhibiting clear renormalization effects by correlations. Interestingly, investigating the origin of this predicted behaviour by analyzing the evolution with temperature of the k-dependent self-energy obtained in our approach, we could identify a number of Brillouin zone points, not probed by ARPES yet, where the largest non-trivial effects of temperature on the renormalization are predicted for the parent compounds.

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“…The discovery of high-temperature superconductivity in iron-based compounds 1 has attracted much attention to investigate their electronic state and superconducting mechanism. The most of the 1111 and the 122 systems show the tetragonal-orthorhombic structural transition and the stripetype antiferromagnetic (AFM) transition.…”

Section: Introductionmentioning

confidence: 99%

Hole-s_± State Induced by Coexisting Ferro- and Antiferromagnetic and Antiferro-orbital Fluctuations in Iron Pnictides

et al. 2016

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The multi-orbital Hubbard model is investigated in order to clarify the electron correlation effects and the superconductivity in the iron-based superconductor. The renormalization effects on the self-energy and the two-particle irreducible vertex function are calculated on the basis of the dynamical mean field theory. We find that the vertex function exhibits a strong renormalization with the significant orbital dependence as compared with the renormalization factor, when the antiferromagnetic and the antiferro-orbital fluctuations are comparably enhanced due to the electron and the hole Fermi surfaces nesting effects. The orbital-dependent vertex function together with the q ∼ 0 nesting between the two-hole Fermi surfaces results in the inter-orbital ferromagnetic fluctuation gradually enhanced which is expected to be observed in LiFeAs. We show that the hole-s±-wave superconductivity with the sign change of the two-hole Fermi surfaces is realized by the enhanced ferromagnetic fluctuation accompanied by the antiferromagnetic fluctuation and the antiferro-orbital fluctuation.

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Iron-Based Layered Superconductor: LaOFeP

Cited by 1,407 publications

References 37 publications

Superconductivity from repulsive interaction

Superconductivity from repulsive interaction

Temperature and doping dependence of normal state spectral properties in a two-orbital model for ferropnictides

Hole-s_± State Induced by Coexisting Ferro- and Antiferromagnetic and Antiferro-orbital Fluctuations in Iron Pnictides

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Iron-Based Layered Superconductor: LaOFeP

Cited by 1,407 publications

References 37 publications

Superconductivity from repulsive interaction

Superconductivity from repulsive interaction

Temperature and doping dependence of normal state spectral properties in a two-orbital model for ferropnictides

Hole-s± State Induced by Coexisting Ferro- and Antiferromagnetic and Antiferro-orbital Fluctuations in Iron Pnictides

Contact Info

Product

Resources

About

Hole-s_± State Induced by Coexisting Ferro- and Antiferromagnetic and Antiferro-orbital Fluctuations in Iron Pnictides