LaFeAsO${}_{1-x}$F${}_x$: A low carrier density superconductor near itinerant magnetism

Abstract

Density functional studies of 26K superconducting LaFeAs(O,F) are reported. We find a low carrier density, high density of states, $N(E_F)$ and modest phonon frequencies relative to $T_c$. The high $N(E_F)$ leads to proximity to itinerant magnetism, with competing ferromagnetic and antiferromagnetic fluctuations and the balance between these controlled by doping level. Thus LaFeAs(O,F) is in a unique class of high $T_c$ superconductors: high $N(E_F)$ ionic metals near magnetism.

Shortened published form. Typos corrected

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Cited by in corpus (350)

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• Sheet Dependence on Superconducting Gap in Oxygen-Deficient Iron-based Oxypnictide Superconductors NdFeAs0.85
• The effect of disorder on electronic Raman scattering in the superconducting state of iron pnictides
• Importance of Itinerancy and Quantum Fluctuations for the Magnetism in Iron Pnictides
• A direct probe of the variability of Coulomb correlation in Fe-pnictide superconductors
• Multiple Superconducting Gaps, Anisotropic Spin Fluctuations and Spin-Orbit Coupling in Iron-Pnictides
• Field-Induced Magnetostructural Transitions in Antiferromagnetic Fe1+yTe1-xSx
• Electronic structure of superconducting Lu2Ni3Si5 and its reference compound Y2Ni3Si5 by ab initio calculations
• Effect of Fermi Surface Topology on Inter-Layer Magnetoresistance in Layered Multiband Systems: Application to LaFeAsO1-xFx
• Spontaneous appearance of nonzero momentum Cooper pairing: Possible application to the iron-pnictides
• Suppression of $T_c$ by Zn impurity in the electron-type LaFe${}_{0.925-y}$Co${}_{0.075}$Zn${}_y$AsO system
• Multiband Semimetallic Electronic Structure of Superconducting Ta2PdSe5
• Itinerant magnetism in metallic CuFe2Ge2
• Status of Iron Based Superconductors: characteristics and relevant properties for applications
• Comment on "Nonmagnetic Impurity Resonances as a Signature of Sign-Reversal Pairing in Fe-As-Based Superconductors"
• Data analysis of $ab$ $initio$ effective Hamiltonians in iron-based superconductors $\unicode{x2014}$ Construction of predictors for superconducting critical temperature
• Structural properties, defects and structural phase transition in the ROFeM (R=La, Nd; M=As, P) materials
• Effective three-band structure in Fe-based superconductors
• Quasiparticle interference in multiband superconductors with strong coupling
• Electronic structure, spin excitations, and orbital ordering in a three-orbital model for iron pnictides
• Impurity states in antiferromagnetic Iron Arsenides
• Exploring multichannel superconductivity in ThFeAsN
• Unconventional superconductivity originating from disconnected Fermi surfaces in the iron-based compound
• Pressure Effects on the Superconducting and Spin-Density-Wave States of the Newly Discovered Sm(O1-xFx)FeAs
• Local transformation of the Electronic Structure and Generation of Free Carriers in Cuprates and Ferropnictides under Heterovalent and Isovalent Doping
• Quantum dynamics of hydrogen in iron-based superconductor LaFeAsO0.9D0.1 measured with inelastic neutron spectroscopy
• Orbital-selective Mott phase of Cu-substituted iron-based Superconductors
• Anomalous local magnetic field distribution and strong pinning in CaFe1.94Co0.06As2 single crystals
• Large increase of the anisotropy factor in the overdoped region of Ba(Fe${}_{1-x}$Ni${}_x$)${}_2$As${}_2$ as probed by fluctuation spectroscopy
• Superconducting Gap and Symmetry in FeSe_1-x_Te_x_ Studied by Specific Heat in Magnetic Fields
• Persistent Magnetism in Silver-doped BaFe2As2 Crystals
• Thermal activation energy of 3D vortex matter in NaFe1-xCoxAs (x=0.01, 0.03 and 0.07) single crystals
• Study of the Two-Gap Superconductivity in GdO(F)FeAs by ScS-Andreev Spectroscopy
• A first principles study on FeAs single layers
• Evidence of spin density wave in LaFeAsO, the parent material of the new Fe-based oxypnictide superconductors
• Universal quasi-degenerate orbital origin of two-dome phases in iron pnictide superconductors
• Evidence for bosonic mode coupling in electron dynamics of LiFeAs superconductor
• High resolution Compton scattering as a Probe of the Fermi surface in the Iron-based superconductor $La{O}_{1-x}{F}_{x}FeAs$
• The local atomic structure of superconducting Fe-Se-Te
• Intersubband pairing induced Fulde-Ferrell phase in metallic nanofilms
• Anomalous impurity effect in the heavy-fermion superconductor CeCu2Si2
• Anisotropic Thermal Transport in Superconductors with Coexisting Spin Density Waves
• Orbital driven two-dome superconducting phases in multiorbital superconductors
• Spin-dependent conductivity of iron-based superconductors in a magnetic field
• Angle-resolved photoemission spectroscopy of Co-based boride superconductor LaCo1.73Fe0.27B2
• Local Structure of Functional Solids
• Twinning of domains and spin anisotropy in K${}_5$Fe${}_4$Ag${}_6$Te${}_{10}$
• Electronic structure of $A$Co${}_2$As${}_2$ ($A=$ Ca, Sr, Ba, Eu) studied using angle-resolved photoemission spectroscopy and theoretical calculations
• Tetragonal-phase SnOFeSe: A possible parent compound of FeSe-based superconductor
• Observation of a ubiquitous three-dimensional superconducting gap function in optimally-doped Ba${}_{0.6}$K${}_{0.4}$Fe${}_2$As${}_2$