Electronic Structure of Fe-Based Superconductors

Abstract

The electronic structure of the Fe-based superconductors is discussed, mainly from the point of view of first principles calculations in relation to experimental data. Comparisons and contrasts with cuprates are made. The problem of reconciling experiments indicating an $s$ symmetry gap with experiments indicating line nodes is discussed and a possible resolution is given.

Updated references. Additional discussion

References in corpus (92)

• Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2
• Unconventional sign-reversing superconductivity in LaFeAsO_(1-x)F_x
• Magnetic Order versus superconductivity in the Iron-based layered La(O1-xFx)FeAs systems
• Unconventional pairing originating from disconnected Fermi surfaces in superconducting LaFeAsO${}_{1-x}$F${}_x$}
• LaFeAsO${}_{1-x}$F${}_x$: A low carrier density superconductor near itinerant magnetism
• Superconductivity at 22 K in Co-doped BaFe2As2 Crystals
• Spin density wave anomaly at 140 K in the ternary iron arsenide BaFe2As2
• Observation of Fermi-surface-dependent nodeless superconducting gaps in Ba0.6K0.4Fe2As2
• The superconductivity at 18 K in LiFeAs system
• Density functional study of FeS, FeSe and FeTe: Electronic structure, magnetism, phonons and superconductivity
• LiFeAs: An Intrinsic FeAs-based Superconductor with Tc = 18K
• Superconductivity at 27 K in tetragonal FeSe under high pressure
• Competing Orders and Spin-Density-Wave Instability in La(O${}_{1-x}$F${}_x$)FeAs
• Is LaO${}_{1-x}$F${}_x$FeAs an electron-phonon superconductor ?
• Very High Field Two-Band Superconductivity in LaFeAsO_0.89F_0.11
• Origin of the ~150 K Anomaly in LaOFeAs; Competing Antiferromagnetic Superexchange Interactions, Frustration, and Structural Phase Transition
• Correlated electronic structure of LaOFeAs
• Superconductivity up to 29 K in SrFe2As2 and BaFe2As2 at high pressures
• Electronic Structure and Doping in BaFe${}_2$As${}_2$ and LiFeAs: Density Functional Calculations
• The challenge of unravelling magnetic properties in LaFeAsO
• Pressure-induced volume-collapsed tetragonal phase of CaFe2As2 as seen via neutron scattering
• Small anisotropy, weak thermal fluctuations, and high field superconductivity in Co-doped iron pnictide Ba(Fe1-xCox)2As2
• Superconductivity in Co-doped LaFeAsO
• The BCS-like gap in superconductor SmFeAsO_0.85F_0.15
• Electronic structure of the iron-based superconductor LaOFeP
• Phase transitions in LaFeAsO: structural, magnetic, elastic, and transport properties, heat capacity and Mossbauer spectra
• Structure and superconductivity of LiFeAs
• Electron-Hole Symmetry and Magnetic Coupling in Antiferromagnetic LaOFeAs
• Evolution from Itinerant Antiferromagnet to Unconventional Superconductor with Fluorine Doping in La(O_{1-x}F_{x})FeAs Revealed by ^{75}As and ^{139}La Nuclear Magnetic Resonance
• Origin of the spin density wave instability in AFe${}_2$As${}_2$ (A=Ba, Sr) as revealed by optical spectroscopy
• ${}^{75}$As NMR studies of superconducting LaO${}_{0.9}$F${}_{0.1}$FeAs
• The Unprecedented Giant Coupling of Fe-spin State and the As-As Hybridization in Iron-Pnictide
• A key role for unusual spin dynamics in ferropnictides
• Scanning Tunneling Spectroscopy and Vortex Imaging in the Iron-Pnictide Superconductor BaFe${}_{1.8}$Co${}_{0.2}$As${}_2$
• Momentum dependence of the superconducting gap in NdFeAsO1-xFx single crystals measured by angle resolved photoemission spectroscopy
• Doping-dependent Phase Diagram of LaO{\it M}As ({\it M}=V--Cu) and Electron-type Superconductivity near Ferromagnetic Instability
• The Fermi surface of Ba(1-x)K(x)Fe2As2 and its evolution with doping
• Iron-based layered superconductor LaO${}_{1-x}$F${}_x$FeAs: an antiferromagnetic semimetal
• Spin-singlet superconductivity with multiple gaps in PrO0.89F0.11FeAs
• Bandwidth and Fermi surface of Iron-Oxypnictides: covalency and sensitivity to structural changes
• Fermi surface of superconducting LaFePO determined by quantum oscillations
• Evidence for two energy scales in the superconducting state of optimally doped (Bi,Pb)2(Sr,La)2CuO6+d
• Multiple Nodeless Superconducting Gaps in (Ba0.6K0.4)Fe2As2 Superconductor from Angle-Resolved Photoemission Spectroscopy
• Determination of anisotropic Hc2 up to 60 T in (Ba0.55K0.45)Fe2As2 single crystals
• Superconductivity under high pressure in LaFeAsO
• Critical Fields and Anisotropy of NdO0.82F0.18FeAs Single Crystals
• Density Functional Study of Excess Fe in Fe${}_{1+x}$Te: Magnetism and Doping
• A possible ground state and its electronic structure of a mother material (LaOFeAs) of new superconductors
• Electrical Resistivity and Specific Heat of EuFe2As2 Single Crystals: Magnetic homologue of SrFe2As2
• Itinerant Ferromagnetism in layered crystals LaCoOX (X = P, As)
• Quantum oscillations in the parent magnetic phase of an iron arsenide high temperature superconductor
• Upper critical field, anisotropy, and superconducting properties of Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$ single crystals
• Momentum-dependence of Superconducting Gap, strong-coupling dispersion Kink, and tightly bound Cooper pairs in the high-Tc (Sr,Ba)1-x(K,Na)xFe2As2 superconductors
• Tightly-bound Cooper pair, quasiparticle kinks and clues on the pairing potential in a high Tc FeAs Superconductor
• First Order Phase Transition and Superconductivity in BaNi2As2 Single Crystals
• Ab initio Derivation of Low-energy Model for Iron-Based Superconductors LaFeAsO and LaFePO
• Theory of the Magnetic Moment in Iron Pnictides
• Electronic structure and Magnetism in BaMn${}_2$As${}_2$ and BaMn${}_2$Sb${}_2$
• 19-F NMR Investigation of Iron-pnictide Superconductor LaFeAsO(0.89)F(0.11)
• Renormalized behavior and proximity to a magnetic quantum critical point in BaCo${}_2$As${}_2$
• 75As NQR/NMR Studies on Oxygen-deficient Iron-based Oxypnictide Superconductors LaFeAsO_{1-y} (y=0,0.25,0.4) and NdFeAsO_{0.6}
• Electronic Structure of Prototype AFe_2As_2 and ReOFeAs High-Temperature Superconductors: a Comparison
• Evidence for Strong Itinerant Spin Fluctuations in the Normal State of CeFeAsO(0.89)F(0.11) Iron-Oxypnictides
• Nickel-based layered superconductor, LaNiOAs
• The London penetration depth in single crystals of Ba(Fe_{1-x}Co_x)_2As_2 at various doping levels
• Strong-coupling superconductivity in layered nickel-based LaO${}_{1-x}$F${}_x$NiAs
• Coulomb repulsion and correlation strength in LaFeAsO from Density Functional and Dynamical Mean-Field Theories
• Density functional study of BaNi${}_2$As${}_2$: Electronic structure, phonons and electron-phonon superconductivity
• Why Ni${}_3$Al is an itinerant ferromagnet but Ni${}_3$Ga is not
• Nuclear magnetic relaxation and superfluid density in Fe-pnictide superconductors: An anisotropic \pm s-wave scenario
• Electronic Structure and Electron Correlation in LaFeAsO_{1-x}F_x and LaFePO_{1-x}F_x
• Suppression of Magnetic Order by Pressure in BaFe2As2
• Normal State Correlated Electronic Structure of Iron Pnictides
• Electromagnetic properties and electronic structure of iron-based layered superconductor LaOFeP
• Electronic Structure of New LiFeAs High-Tc Superconductor
• Low-temperature magneto-thermal transport investigation of a Ni-based superconductor BaNi2As2: Evidence for fully gapped superconductivity
• High Temperature Superconductivity in Transition Metal Oxypnictides: a Rare-Earth Puzzle?
• Effect of 3d Transition Metal Doping on the Superconductivity in Quaternary Fluoroarsenide CaFeAsF
• X-ray spectra and electronic structure of FeAs superconductors
• Electronic structure of oxygen-free 38K superconductor Ba1-xKxFe2As2 in comparison with BaFe2As2 from first principles
• Electron Phonon Superconductivity in LaNiOP
• Spin Fluctuations and the Magnetic Phase Diagram of ZrZn2
• Origin of the shadow Fermi surface in Bi-based cuprates
• Role of covalent Fe-As bonding in the magnetic moment formation and exchange mechanisms in iron-pnictide superconductors
• Shadow bands in single-layered Bi_2Sr_2CuO_6 studied by angle-resolved photoemission spectroscopy
• Valence band and core level photoemission spectros-copy of LaFeAsO${}_{1-x}$F${}_x$
• Electron energy-loss spectroscopy and ab initio electronic structure of the LaOFeP superconductor
• Electronic structure and Fermi surface character of LaONiP from first principles
• Mechanism of phase transitions and the electronic density of states in (La,Sm)FeAsO${}_{1-x}$F${}_x$ from ab initio calculations
• Positron potential and wavefunction in LaFeAsO
• Local antiferromagnetic correlations in the iron pnictide superconductors LaFeAsO{1-x}F{x} and Ca(Fe,Co)2As2 as seen via normal-state susceptibility
• Abnormal T-linear susceptibility and Phase diagram of BaFe${}_{2-x}$Co${}_x$As${}_2$ single crystals

Cited by in corpus (65)

• Superconductivity in Iron Compounds
• High-temperature superconductivity in iron-based materials
• Orbital Fluctuation Mediated Superconductivity in Iron Pnictides: Analysis of Five Orbital Hubbard-Holstein Model
• Electronic Structure Calculations with the Tran-Blaha Modified Becke-Johnson Density Functional
• Iron based high transition temperature superconductors
• Spin Gap and Resonance at the Nesting Wavevector in Superconducting FeSe0.4Te0.6
• Neutron Studies of the Iron-based Family of High TC Magnetic Superconductors
• Frustrated Magnetic Interactions, Giant Magneto-Elastic Coupling, and Magnetic Phonons in Iron-Pnictides
• Superconductivity in Ru substituted BaFe2-xRuxAs2
• Effect of Eu magnetism on the electronic properties of the candidate Dirac material EuMnBi2
• Nanoscale phase separation of antiferromagnetic order and superconductivity in K${}_{0.75}$Fe${}_{1.75}$Se${}_2$
• Spin fluctuations in LiFeAs observed by neutron scattering
• Effects of correlation in LiFeAs
• Self consistent GW determination of the interaction strength: application to the iron arsenide superconductors
• Doping Driven ($\pi ,0$) Nesting and Magnetic Properties of Fe${}_{1+x}$Te Superconductors
• Anisotropic Structure of the Order Parameter in FeSe0.45Te0.55 Revealed by Angle Resolved Specific Heat
• Magnetic ordering in mackinawite (tetragonal FeS): evidence for strong itinerant spin fluctuations
• Dynamical correlations and screened exchange on the experimental bench: spectral properties of the cobalt pnictide BaCo2As2
• Infrared spectrum and its implications for the electronic structure of the semiconducting iron selenide K${}_{0.83}$Fe${}_{1.53}$Se${}_2$
• Accounting for spin fluctuations beyond LSDA in the density functional theory
• High energy pseudogap and its evolution with doping in Fe-based superconductors as revealed by optical spectroscopy
• Electronic Structure, Localization and Spin-State Transition in Cu-substituted FeSe: Fe${}_{1-x}$Cu${}_x$Se
• Electronic Structure of KFe${}_2$Se${}_2$ from First Principles Calculations
• Spectral properties of transition metal pnictides and chalcogenides: angle-resolved photoemission spectroscopy and dynamical mean field theory
• Optical spectroscopy study on single crystalline LaFeAsO
• Doping Dependence of Hall Coefficient and Evolution of Coherent Electronic State in the Normal State of Fe-based Superconductor Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$
• Resistivity and magnetoresistance of FeSe single crystals under Helium-gas pressure
• Modeling Antiferromagnetic Phase in Iron Pnictides: Weakly Ordered State
• Two-band BCS superconductivity in Ba(Fe0.9Co0.1)2As2
• Electronic structure of single-crystalline Sr(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ probed by x-ray absorption spectroscopy: Evidence for isovalent substitution of Fe${}^{2+}$ by Co${}^{2+}$
• Different effects of Ni and Co substitution on the transport properties of BaFe2As2
• Nodes vs. minima in the energy gap of iron-pnictides from field-induced anisotropy
• Evolution of Superconducting Gaps in Th-Substituted Sm${}_{1-x}$Th${}_x$OFeAs Studied by Multiple Andreev Reflection Spectroscopy
• Calculated Cleavage Behavior and Surface States of LaOFeAs
• Unusual Phase Transitions and Magnetoelastic Coupling in TlFe1.6Se2 Single Crystals
• Statistics of subgap states in $s_{\pm }$ superconductors
• ThFeAsN in Relation to Other Iron-Based Superconductors
• On the Structure of Superconducting Order Parameter in High-Temperature Fe-Based Superconductors
• Inelastic Neutron Scattering Studies of the Spin and Lattice Dynamics in Iron Arsenide Compounds
• Optical study on the spin-density wave properties in single crystalline Na${}_{1-\delta }$FeAs
• Two-Particle Self-Consistent method for the multi-orbital Hubbard model
• Microscopic origin of the linear temperature increase of the magnetic susceptibility of BaFe${}_2$As${}_2$
• First-Principle Wannier function analysis of the electronic structure of PdTe: Weaker magnetism and superconductivity
• Role of Magnetism in Superconductivity of BaFe2As2: Study of 5d Au-doped Crystals
• Magnetism in Na-filled Fe-based skutterudites
• A density functional theory study of FeAs comparing LDA+U, GGA+U and hybrid functionals
• Magnetic form factor of SrFe${}_2$As${}_2$
• Competing magnetic ground states and their coupling to the crystal lattice in CuFe2Ge2
• Magnetic properties of FeSe superconductor
• The influence of spin fluctuations on the thermal conductivity in superconducting Ba(Fe_{1-x}Co_x)_2As_2
• Observation of Multiple Superconducting Gaps in the Infrared Reflectivity Spectra of Ba(Fe0.9Co0.1)2As2
• Upper critical field of the 122-type iron pnictide superconductors
• A flat band at the chemical potential of a Fe1.03Te0.94S0.06 superconductor observed by angle-resolved photoemission spectroscopy
• Electron-phonon coupling in the superconducting single crystal Rb${}_{0.8}$Fe${}_{1.68}$Se${}_2$
• Resistivity in Co-doped Ba-122: comparison of thin films and single crystals
• Dynamic approach to finite-temperature magnetic phase transitions in the extended J1- J2 model with vacancy order
• Evidence of a multiple boson emission in Sm${}_{1-x}$Th${}_x$OFeAs
• Exploring multichannel superconductivity in ThFeAsN
• Interplay between Magnetic and Vestigial Nematic Orders in the Layered $J_1$-$J_2$ Classical Heisenberg Model
• Metallicity of Ca2Cu6P5 with Single and Double Copper-Pnictide Layers
• Study of the Two-Gap Superconductivity in GdO(F)FeAs by ScS-Andreev Spectroscopy
• Persistent Magnetism in Silver-doped BaFe2As2 Crystals
• Impact of atomic defects in the electronic states of FeSe${}_{1-x}$S${}_x$ superconducting crystals
• The role of magnetic excitations in magnetoresistance and Hall effect of slightly TM-substituted BaFe${}_2$As${}_2$ compounds (TM = Mn, Cu, Ni)
• Temperature and doping dependence of normal state spectral properties in a two-orbital model for ferropnictides