Magnetism in Fe-based superconductors

Abstract

In this review, we present a summary of experimental studies of magnetism in Fe-based superconductors. The doping dependent phase diagram shows strong similarities to the generic phase diagram of the cuprates. Parent compounds exhibit magnetic order together with a structural phase transition both of which are progressively suppressed with doping allowing superconductivity to emerge. The stripe-like spin arrangement of Fe moments in the magnetically ordered state shows the identical in-plane structure for the RFeAsO (R=rare earth) and AFe2As2 (A=Sr, Ca, Ba, Eu and K) parent compounds, notably different than the spin configuration of the cuprates. Interestingly, Fe1+yTe orders with a different spin order despite very similar Fermi surface topology. Studies of the spin dynamics in the parent compounds shows that the interactions are best characterized as anisotropic three-dimensional (3D) interactions. Despite the room temperature tetragonal structure, analysis of the low temperature spin waves under the assumption of a Heisenberg Hamiltonian indicates strong in-plane anisotropy with a significant next-near neighbor interaction. In the superconducting state, a resonance, localized in both wavevector and energy is observed in the spin excitation spectrum as in the cuprates. This resonance is observed at a wavevector compatible with a Fermi surface nesting instability independent of the magnetic ordering of the relevant parent compound. The resonance energy (Er) scales with superconducting transition temperature (TC) as Er ~4.9 kBTC consistent with the canonical value of ~5 kBTC observed in the cuprates. Moreover, the relationship between the resonance energy and the superconducting gap, Δ, is similar to that observed in many unconventional superconductors (Er/2Δ~ 0.64).

To be published as a topical review for Journal of Physics: Condensed Matter (13 figures)

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Cited by in corpus (190)

• The Puzzle of High Temperature Superconductivity in Layered Iron Pnictides and Chalcogenides
• Superconductivity in Iron Compounds
• High-temperature superconductivity in iron-based materials
• A Common Thread: the pairing interaction for the unconventional superconductors
• Gap symmetry and structure of Fe-based superconductors
• Antiferromagnetic order and spin dynamics in iron-based superconductors
• Ironing out the details of unconventional superconductivity
• Iron based superconductors: magnetism, superconductivity and electronic structure
• Functional Renormalization Group for multi-orbital Fermi Surface Instabilities
• Unified Picture for Magnetic Correlations in Iron-Based Superconductors
• Coexistence of Magnetism and Superconductivity in the Iron-based Compound Cs_0.8(FeSe_0.98)_2
• Magnetically-Driven Suppression of Nematic Order in an Iron-Based Superconductor
• Fe-based superconductors: an angle-resolved photoemission spectroscopy perspective
• Magnetic Exchange Interactions in BaMn2As2: A Case Study of the J1-J2-Jc Heisenberg Model
• Character of the structural and magnetic phase transitions in the parent and electron doped BaFe2As2 compounds
• Revealing the dual nature of magnetism in iron pnictides and iron chalcogenides using x-ray emission spectroscopy
• Bipartite magnetic parent phases in the iron-oxypnictide superconductor
• Symmetry of spin excitation spectra in the tetragonal paramagnetic and superconducting phases of 122-ferropnictides
• Electronic nematic susceptibility of iron-based superconductors
• Interplay between magnetism and superconductivity in iron-chalcogenide superconductors: crystal growth and characterizations
• Spin fluctuations in LiFeAs observed by neutron scattering
• Interplay of magnetic and structural transitions in Fe-based pnictide superconductors
• Spin fluctuations in iron pnictides and chalcogenides: From antiferromagnetism to superconductivity
• Unconventional temperature enhanced magnetism in iron telluride
• Itinerant Spin Excitations in SrFe2As2 Measured by Inelastic Neutron Scattering
• The Cold Neutron Chopper Spectrometer at the Spallation Neutron Source - A Review of the first 8 Years of Operation
• 57-Fe Mossbauer study of magnetic ordering in superconducting K_0.85Fe_1.83Se_2.09 single crystals
• Neutron and ARPES Constraints on the Couplings of the Multiorbital Hubbard Model for the Pnictides
• Competing magnetic ground states in non-superconducting Ba(Fe1-xCrx)2As2
• New ternary ThCr2Si2-type iron-selenide superconducting materials: synthesis, properties and simulations
• Superconductivity in the iron selenide KxFe2Se2 (0 <= x <= 1)
• Crystallographic, Electronic, Thermal and Magnetic Properties of Single-Crystal SrCo2As2
• Crystal Growth and Physical Properties of SrCu2As2, SrCu2Sb2 and BaCu2Sb2
• Block magnetic excitations in the orbitally selective Mott insulator BaFe2Se3
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• Two energy scales in the magnetic resonance spectrum of electron and hole doped pnictide superconductors
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• Magnetic order in orbital models of the iron pnictides
• Similar zone-center gaps in the low-energy spin-wave spectra of NaFeAs and BaFe2As2
• The suppression of magnetism and the development of superconductivity within the collapsed tetragonal phase of Ca0.67Sr0.33Fe2As2 at high pressure
• Spin Ferroquadrupolar Order in the Nematic Phase of FeSe
• Crossover in the magnetic response of single-crystalline Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$ and Lifshitz critical point evidenced by Hall effect measurements
• Effect of Li-deficiency impurities on the electron-overdoped LiFeAs superconductor
• The magnetic moment enigma in Fe-based high temperature superconductors
• Plutonium-Based Heavy-Fermion Systems
• Antiferromagnetic spin excitations in single crystals of nonsuperconducting Li1-xFeAs
• Spin anisotropy of the resonance in superconducting FeSe0.5Te0.5
• Long- to short-range magnetic order in fluorine-doped CeFeAsO
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• Incommensurate magnetic fluctuations and Fermi surface topology in LiFeAs
• Iron-platinum-arsenide superconductors Ca10(PtnAs8)(Fe2-xPtxAs2)5
• Nematic state in CeAuSb${}_2$
• Phase transitions in spin-orbital models with spin-space anisotropies for iron-pnictides: A study through Monte Carlo simulations
• Spin and Orbital Characters of Excitations in Iron Arsenide Superconductors Revealed by Simulated Fe L-Edge RIXS
• Effect of intraband Coulomb repulsion on the excitonic spin-density wave
• Superconductivity in the Cu(Ir1-xPtx)2Se4 Spinel
• Spin resonance in the superconducting state of Li${}_{1-x}$Fe${}_x$ODFe${}_{1-y}$Se observed by neutron spectroscopy
• Spin excitations in the nematic phase and the metallic stripe spin-density wave phase of iron pnictides
• Anomalous proximity effects at the interface of s and s+- superconductors
• Local and collective magnetism of EuFe${}_2$As${}_2$
• Superconducting phase fluctuations in SmFeAsO${}_{0.8}$F${}_{0.2}$ from diamagnetism at low magnetic field above $T_c$
• Evolution of the multiband RKKY interaction: Application to iron pnictides and chalcogenides
• Local structural variation as source of magnetic moment reduction in BaFe2As2
• Dynamic Superconductivity Responses in Photo-excited Optical Conductivity and Nernst Effect
• Spin fluctuations away from (pi,0) in the superconducting phase of molecular-intercalated FeSe
• Anisotropic magnetism, resistivity, London penetration depth and magneto-optical imaging of superconducting K0.80Fe1.76Se2 single crystals
• Structure and magnetic properties of {\it Ln}MnSbO ({\it Ln} = La and Ce) and CeMnAsO
• Superconducting pairing in the spin-density-wave phase of iron pnictides
• Theoretical Investigation of Optical Conductivity in Ba [Fe(1-x)Co(x)]2 As2
• Pressure-induced collapsed-tetragonal phase in SrCo2As2
• Pseudogap-like phase in Ca(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ revealed by ${}^{75}$As NQR
• Effect of gap anisotropy on the spin resonance peak in the superconducting state of iron-based materials
• Collinear antiferromagnetism in trigonal SrMn${}_2$As${}_2$ revealed by single-crystal neutron diffraction
• Spin resonance peak in Fe-based superconductors with unequal gaps
• A view from inside iron-based superconductors
• Improving quantum-transition temperatures in BaFe2As2-based crystals by removing local-lattice strain & electronic-structure disorder
• Commensurate antiferromagnetic ordering in Ba(Fe{1-x}Co{x})2As2 determined by x-ray resonant magnetic scattering at the Fe K-edge
• Anomalous superconducting state in LiFeAs implied by the ${}^{75}$As Knight shift measurement
• First-principles evidence of Mn moment canting in hole-doped Ba${}_{1-2x}$K${}_{2x}$Mn${}_2$As${}_2$
• Role of Dirac cones in magnetotransport properties of REFeAsO (RE=rare earth) oxypnictides
• Charge redistribution at the antiferromagnetic phase transition in SrFeAsF compound
• Doping dependent evolution of magnetism and superconductivity in Eu1-xKxFe2As2 (x = 0-1) and temperature dependence of lower critical field Hc1
• Evolution of the neutron resonances in AFe2Se2
• Phase diagram of Josephson junction between s and s+- superconductors in dirty limit
• Muon spin rotation and infrared spectroscopy study of magnetism and superconductivity in Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$
• Synthesis, phase stability, structural and physical properties of 11-type iron chalcogenides
• Temperature dependent local structure of NdFeAsO1-xFx system using arsenic K-edge extended x-ray absorption fine structure
• Magnetic hour-glass dispersion and its relation to high-temperature superconductivity in iron-tuned Fe${}_{1+y}$Te${}_{0.7}$Se${}_{0.3}$
• Competing spin density wave, collinear, and helical magnetism in Fe1+xTe
• Field-induced nematic-like magnetic transition in an iron pnictide superconductor, Ca${}_{10}$(Pt${}_3$As${}_8$)((Fe${}_{1-x}$Pt${}_x$)${}_2$As${}_2$)${}_5$
• Magnetic order tuned by Cu substitution in Fe1.1-zCuzTe
• Iron-based superconductors: tales from the nuclei
• Magnetic neutron diffraction study of Ba(Fe1-xCox)2As2 critical exponents through the tricritical doping
• Exchange striction driven magnetodielectric effect and potential photovoltaic effect in polar CaOFeS
• Role of Magnetism in Superconductivity of BaFe2As2: Study of 5d Au-doped Crystals
• Linkage between scattering rates and superconductivity in doped ferropnictides
• Coexistence of superconductivity and magnetism in K0.8Fe2Se1.4S0.4
• Magnetism in Na-filled Fe-based skutterudites
• Magneto-structural coupling and harmonic lattice dynamics in CaFe${}_2$As${}_2$ probed by Mössbauer spectroscopy
• Magnetic moment evolution and spin freezing in doped BaFe${}_2$As${}_2$
• Superconductivity in titanium-based pnictide oxide compounds
• Large low-temperature magnetoresistance in SrFe2As2 single crystals
• Disentangling superconducting and magnetic orders in NaFe_1-xNi_xAs using muon spin rotation
• Coexistence of superconductivity and short-range double-stripe spin correlations in Te-vapor annealed FeTe${}_{1-x}$Se${}_x$ with $x\le 0.2$
• Doping dependence of the spin excitations in Fe-based superconductors Fe1+yTe1-xSex
• Effect of uniaxial pressure on the magneto-structural transitions of iron arsenide superconductors
• Evolution of Structure and Superconductivity in Ba(Ni${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Low energy magnetic excitations from the Fe${}_{1+y-z}$(Ni/Cu)${}_z$Te${}_{1-x}$Se${}_x$ system
• Mössbauer studies of the peculiar magnetism in parent compounds of the iron-based superconductors
• The influence of spin fluctuations on the thermal conductivity in superconducting Ba(Fe_{1-x}Co_x)_2As_2
• Details of the disorder-induced transition between $s_{\pm }$ and $s_{++}$ states in two-band model for Fe-based superconductors
• Local Structure and Hyperfine Interactions of 57Fe in NaFeAs Studied by Mossbauer Spectroscopy
• Two-dimensional Cs-vacancy superstructure in iron-based superconductor $C{s}_{0.8}F{e}_{1.6}S{e}_2$
• Doping dependence of antiferromagnetism in models of the pnictides
• "Forbidden" phonon: dynamical signature of bond symmetry breaking in the iron chalcogenides
• Point contact spectroscopy in Fe-based superconductors: recent advancements and future challenges
• Electronic structure and weak itinerant magnetism in metallic Y2Ni7
• Nonlinear and time-resolved optical study of the 112-type iron-based superconductor parent Ca${}_{1-x}$La${}_x$FeAs${}_2$ across its structural phase transition
• Competing superconducting and magnetic order parameters and field-induced magnetism in electron doped Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Magnetically polarized Ir dopant atoms in superconducting Ba(Fe${}_{1-x}$Ir${}_x$)${}_2$As${}_2$
• Nanoscale visualization of the thermally-driven evolution of antiferromagnetic domains in FeTe thin films
• Enhanced spin ordering temperature in ultrathin FeTe films grown on a topological insulator
• Tuning the magnetic and structural phase transitions of PrFeAsO via Fe/Ru spin dilution
• Parallel suppression of superconductivity and Fe moment in the collapsed tetragonal phase of Ca0.67Sr0.33Fe2As2 under pressure
• Magnetic surface reconstruction in the van-der-Waals antiferromagnet Fe${}_{1+x}$Te
• Topological surface states and Andreev bound states in superconducting iron pnictides
• Block antiferromagnetism and possible ferroelectricity in KFe${}_2$Se${}_2$
• Pressure induced renormalization of energy scales in the unconventional superconductor FeTe0.6Se0.4
• Magnetism driven by strong electronic correlation in the heavily carrier-doped iron oxypnictide LaFeAsO${}_{0.49}$H${}_{0.51}$
• Competing magnetic phases and field-induced dynamics in DyRuAsO
• Semimetallic spin-density wave state in iron pnictides
• Evidence for proximity of YFe${}_2$Si${}_2$ to a magnetic quantum critical point
• Evolution of quasiparticle states with and without a Zn-impurity in doped 122 iron pnictides
• Superconducting and Antiferromagnetic Properties of Dual-Phase V${}_3$Ga
• Doping evolution of the gap structure and spin-fluctuation pairing in $Ba(F{e}_{1-x}C{o}_x{)}_{2}A{s}_2$ superconductors
• Temperature dependent As K-edge EXAFS studies of LaFe1-xCoxAsO (x = 0.0 and 0.11) single crystals
• Structural investigation of the Sm(Fe1-xRux)As(O0.85F0.15) system: a synchrotron X-ray powder diffraction study
• Fast recovery of the pristine magnetic and structural phases in superconducting LaFeAsO${}_{0.89}$F${}_{0.11}$ by Mn/Fe substitution
• Absence of strong magnetic fluctuations in the iron phosphide superconductors LaFePO and Sr2ScO3FeP
• Direct observation of the spin exciton in Andreev spectroscopy of iron-based superconductors
• Induced polarization at a paraelectric/superconducting interface
• Multi-orbital quantum antiferromagnetism in iron pnictides --- effective spin couplings and quantum corrections to sublattice magnetization
• Observation of multiple superconducting gaps in Fe1+yTe1-xSex via a nano-scale approach to point-contact spectroscopy
• High-entropy magnetism of murunskite
• Inverse melting and intertwined orders in PrCuSb${}_2$
• Persistent Magnetism in Silver-doped BaFe2As2 Crystals
• Metallicity of Ca2Cu6P5 with Single and Double Copper-Pnictide Layers
• Odd-Parity Magnetism in Fe-Based Superconductors
• Thermodynamics of $s_{\pm }-to-s_{++}$ transition in iron pnictides in the vicinity of the Born limit
• A Mössbauer study of the magneto-structural coupling effect in SrFe${}_2$As${}_2$ and SrFeAsF
• Superconducting order parameter structure in the nematic phase of iron-based materials
• Antiferromagnetic order and its interplay with superconductivity in CaK(Fe${}_{1-x}$Mn${}_x$)${}_4$As${}_4$
• Magnetic Scattering Chapter
• Unified Spin Model for Magnetic Excitations in Iron Chalcogenides
• Acoustic lattice instabilities at the magneto-structural transition in Fe${}_{1.057(7)}$Te
• Spin dynamics in itinerant antiferromagnet SrCr${}_2$As${}_2$
• Band structure of organic-ion-intercalated (EMIM)${}_x$FeSe superconductor
• Q Dependence of Magnetic Resonance Mode on FeTe${}_{0.5}$Se${}_{0.5}$ Studied by Inelastic Neutron Scattering