Spin Gap and Resonance at the Nesting Wavevector in Superconducting FeSe0.4Te0.6

Abstract

Neutron scattering is used to probe magnetic excitations in FeSe_{0.4}Te_{0.6} (T_c=14 K). Low energy spin fluctuations are found with a characteristic wave vector $(0.5,0.5,L)$ that corresponds to Fermi surface nesting and differs from Q_m=(δ,0,0.5) for magnetic ordering in Fe_{1+y}Te. A spin resonance with \hbarΩ_0=6.5 meV \approx 5.3 k_BT_c and \hbarΓ=1.25 meV develops in the superconducting state from a normal state continuum. We show that the resonance is consistent with a bound state associated with s+/- superconductivity and imperfect quasi-2D Fermi surface nesting.

4 pages, 4 figures, Submitted to Phys. Rev. Lett

References in corpus (37)

• Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2
• Magnetic Order versus superconductivity in the Iron-based layered La(O1-xFx)FeAs systems
• Superconductivity at 43 K in Samarium-arsenide Oxides $SmFeAs{O}_{1-x}{F}_x$
• Superconductivity at 41 K and its competition with spin-density-wave instability in layered CeO${}_{1-x}$F${}_x$FeAs
• Observation of Fermi-surface-dependent nodeless superconducting gaps in Ba0.6K0.4Fe2As2
• The superconductivity at 18 K in LiFeAs system
• Magnetic order in BaFe2As2, the parent compound of the FeAs based superconductors in a new structural family
• Superconductivity up to 37 K in (A1-xSrx)Fe2As2 with A=K and Cs
• LiFeAs: An Intrinsic FeAs-based Superconductor with Tc = 18K
• Competing Orders and Spin-Density-Wave Instability in La(O${}_{1-x}$F${}_x$)FeAs
• Superconductivity close to magnetic instability in Fe(Se1-xTex)0.82
• Incommensurate magnetic order in the alpha-Fe(Te,Se) superconductor systems
• Resonant Spin Excitation in the High Temperature Superconductor Ba0.6K0.4Fe2As2
• Pressure induced superconductivity in CaFe${}_2$As${}_2$
• Pairing Symmetry and Pairing State in Ferropnictides: Theoretical Overview
• Neutron Scattering from Magnetic Excitations in Bi_2 Sr_2 Ca_2 O_8+delta
• Lattice and magnetic instabilities in CaFe2As2: A single crystal neutron diffraction study
• Multiband magnetism and superconductivity in Fe-based compounds
• Phase transitions in LaFeAsO: structural, magnetic, elastic, and transport properties, heat capacity and Mossbauer spectra
• Structure and superconductivity of LiFeAs
• Theory of magnetic excitations in iron-based layered superconductors
• Spin resonance in the d-wave superconductor CeCoIn5
• Two-dimensional resonant magnetic excitation in BaFe1.84Co0.16As2
• Iron-based layered superconductor LaO${}_{1-x}$F${}_x$FeAs: an antiferromagnetic semimetal
• Magnetic Resonant Mode in the Single-Layer High Temperature Superconductor Tl${}_2$Ba${}_2$Cu${}_{6+\delta }$
• Fermi surface topology and low-lying quasiparticle dynamics of parent Fe${}_{1+x}$Te/Se Superconductor by orbital-polarization resolved ARPES
• Fermi surface topology and low-lying quasiparticle structure of magnetically ordered Fe1+xTe
• Neutron scattering as a probe of the Fe-pnicitide superconducting gap
• Multiple Nodeless Superconducting Gaps in (Ba0.6K0.4)Fe2As2 Superconductor from Angle-Resolved Photoemission Spectroscopy
• Incommensurate magnetic structure of CeRhIn5
• Three-dimensional Resonance in superconducting BaFe${}_{1.9}$Ni${}_{0.1}$As${}_2$
• Electronic Structure of Fe-Based Superconductors
• Superconductivity: Exotic Commonalities in Phase and Mode
• Dramatic Switching of Magnetic Exchange in a Classic Transition Metal Oxide: Evidence for Orbital Ordering
• Transport properties and superconductivity in $B{a}_{1-x}{M}_{x}F{e}_{2}A{s}_2$ (M=La and K) with double FeAs layers
• Spin gap and magnetic resonance in superconducting BaFe${}_{1.9}$NiAs${}_2$
• The resonant magnetic mode: a common feature of high-$T_C$ superconductors

Cited by in corpus (162)

• The Puzzle of High Temperature Superconductivity in Layered Iron Pnictides and Chalcogenides
• Superconductivity in Iron Compounds
• High-temperature superconductivity in iron-based materials
• Gap symmetry and structure of Fe-based superconductors
• Antiferromagnetic order and spin dynamics in iron-based superconductors
• Electronic structure of quantum materials studied by angle-resolved photoemission spectroscopy
• Magnetism and its microscopic origin in iron-based high-temperature superconductors
• Heavily electron-doped electronic structure and isotropic superconducting gap in AxFe2Se2 (A=K,Cs)
• Magnetism in Fe-based superconductors
• Strong Interplay between Stripe Spin Fluctuations, Nematicity and Superconductivity in FeSe
• From (pi, 0) magnetic order to superconductivity with (pi, pi) magnetic resonance in Fe1.02(Te1-xSex)
• Charge carrier localization induced by excess Fe in the Fe1+y(Te,Se) superconductor system
• Magnetically driven superconductivity in CeCu2Si2
• Strong electron correlations in the normal state of FeSe0.42Te0.58
• Unified Picture for Magnetic Correlations in Iron-Based Superconductors
• Using Gap Symmetry and Structure to Reveal the Pairing Mechanism in Fe-based Superconductors
• Phase diagram and Gap anisotropy in Iron-Pnictide Superconductors
• Fe-based superconductors: an angle-resolved photoemission spectroscopy perspective
• Evolution of spin excitations into the superconducting state in FeTe1-xSex
• Origin of Orthorhombic Transition, Magnetic Transition, and Shear Modulus Softening in Iron Pnictide Superconductors: Analysis based on the Orbital Fluctuation Theory
• Chalcogen-height dependent magnetic interactions and magnetic order switching in FeSe${}_x$Te${}_{1-x}$
• Iron Displacements and Magnetoelastic Coupling in the Spin-Ladder Compound BaFe2Se3
• Isotropic superconducting gaps with enhanced pairing on electron Fermi surfaces in FeTe0.55Se0.45
• Magnetic-crystallographic phase diagram of superconducting parent compound Fe${}_{1+x}$Te
• Structure of Neutron-Scattering Peak in both s++ wave and s+- wave states of an Iron pnictide Superconductor
• Symmetry of spin excitation spectra in the tetragonal paramagnetic and superconducting phases of 122-ferropnictides
• Effect of Fe excess on structural, magnetic and superconducting properties of single-crystalline Fe(1+x)Te(1-y)Se(y)
• Orbital Fluctuation Theory in Iron Pnictides: Effects of As-Fe-As Bond Angle, Isotope Substitution, and $Z^2$-Orbital Pocket on the Superconductivity
• Interplay between magnetism and superconductivity in iron-chalcogenide superconductors: crystal growth and characterizations
• Crossover from weak to strong pairing in unconventional superconductors
• Magnetic Resonant Mode in the Low-Energy Spin-Excitation Spectrum of Superconducting Rb2Fe4Se5 Single Crystals
• Investigation of the spin-glass regime between the antiferromagnetic and superconducting phases in Fe${}_{1+y}$Se${}_x$Te${}_{1-x}$
• Strong $(\pi ,0)$ spin fluctuations in $\beta$-FeSe observed by neutron spectroscopy
• Spin waves in the $(\pi ,0)$ magnetically ordered iron chalcogenide Fe${}_{1.05}$Te
• Revised Phase Diagram for FeTe1-xSex system with less excess Fe atoms
• Physics and chemistry review of layered chalcogenide superconductors
• Interface enhanced electron-phonon coupling and high temperature superconductivity in potassium-coated ultra-thin FeSe films on SrTiO3
• Spin fluctuations in iron pnictides and chalcogenides: From antiferromagnetism to superconductivity
• Thermodynamic phase diagram of Fe(Se${}_{0.5}$Te${}_{0.5}$) single crystals up to 28 Tesla
• Dispersive Spin Fluctuations in the near optimally-doped superconductor Ba(Fe1-xCox)2As2 ($x$=0.065)
• Incommensurate itinerant antiferromagnetic excitations and spin resonance in the FeTe${}_{0.6}$Se${}_{0.4}$ superconductor
• London penetration depth and superfluid density in single crystals of Fe(Te,Se) and Fe(Te,S) superconductors
• Emergence of Fully-Gapped $s_{++}$-wave and Nodal d-wave States Mediated by Orbital- and Spin-Fluctuations in Ten-Orbital Model for KFe${}_2$Se${}_2$
• Boundary-obstructed topological high-T${}_c$ superconductivity in iron pnictides
• Growth conditions, structure, and superconductivity of pure and metal-doped FeTe1-xSex single crystals
• Electronic correlations and unusual superconducting response in the optical properties of the iron-chalcogenide FeTe0.55Se0.45
• Incommensurate magnetic excitations in superconducting LiFeAs
• Superconductivity, Antiferromagnetism, and Neutron Scattering
• Effects of Ru Doping on the Transport Behavior and Superconducting Transition Temperature of NdFeAsO0.89F0.11
• Superconducting Properties of the $s^{\pm }$-wave state: Fe-based superconductors
• Unusual Relationship between Magnetism and Superconductivity in FeTe${}_{0.5}$Se${}_{0.5}$
• Interface high-temperature superconductivity
• Stripes, spin resonance and $d_{x^2-y^2}-$pairing symmetry in FeSe-based layered superconductors
• Close relationship between superconductivity and the bosonic mode in Ba0.6K0.4Fe2As2 and Na(Fe0.975Co0.025)As
• Short-range incommensurate magnetic order near the superconducting phase boundary in Fe(1+d)Te(1-x)Se(x)
• 77Se NMR study of pairing symmetry and spin dynamics in KyFe2-xSe2
• Coupling of spin and orbital excitations in the iron-based superconductor FeSe(0.5)Te(0.5)
• Interstitial Iron Controlled Superconductivity in Fe1+xTe0.7Se0.3
• Interstitial iron tuning of the spin fluctuations in Fe1+xTe
• The phase diagrams of iron-based superconductors: theory and experiments
• Anisotropic and quasipropagating spin excitations in superconducting Ba(Fe0.926Co0.074)2As2
• Magnetic, superconducting, and topological surface states on Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$
• Non-Thermal Emergence of an Orbital-Selective Mott Phase in FeTe${}_{1-x}$Se${}_x$
• Correlation-Driven Electronic Reconstruction in FeTe${}_{1-x}$Se${}_x$
• Disappearance of static magnetic order and evolution of spin fluctuations in Fe${}_{1+\delta }$Se${}_x$Te${}_{1-x}$
• Calorimetric Evidence of Strong-Coupling Multiband Superconductivity in Fe(Te0.57Se0.43) Single Crystal
• The magnetic and structural properties near the Lifshitz point in Fe1+xTe
• Degradation of superconductivity and spin fluctuations by electron over-doping in LaFeAsO${}_{1-x}$F${}_x$
• Friedel-like Oscillations from Interstitial Iron in Superconducting Fe1+yTe0.62Se0.38
• Phonon, Two-Magnon and Electronic Raman Scattering of Fe1+yTe1-xSex
• Distinguishing $s^{\pm }$ and $s^{++}$ electron pairing symmetries by neutron spin resonance in superconducting NaFe${}_{0.935}$Co${}_{0.045}$As
• Effect of magnetic field on the spin resonance in FeTe(0.5)Se(0.5) as seen via inelastic neutron scattering
• Neutron-Inelastic-Scattering Peak by Dissipationless Mechanism in the s++ -wave State in Iron-based Superconductors
• Electron doping evolution of the magnetic excitations in BaFe2-xNixAs2
• Inelastic neutron scattering study on the resonance mode in an optimally doped superconductor LaFeAsO${}_{0.92}$F${}_{0.08}$
• Superconducting state in Fe-based materials and spin-fluctuation theory of pairing
• Coexisting spin resonance and long-range magnetic order of Eu in EuRbFe${}_4$As${}_4$
• Correlation-driven topological Fermi surface transition in FeSe
• Conformity of spin fluctuations in alkali-metal iron selenide superconductors inferred from the observation of a magnetic resonant mode in K(x)Fe(2-y)Se(2)
• Odd and even modes of neutron spin resonance in the bilayer iron-based superconductor CaKFe${}_4$As${}_4$
• Specific-heat study of superconducting and normal states in FeSe1-xTex (0.6<=x<=1) single crystals: Strong-coupling superconductivity, strong electron-correlation, and inhomogeneity
• Doping Dependence of Spin Dynamics in Electron-Doped Ba(Fe1-xCox)2As2
• Spatial Inhomogeneity of the Superconducting Gap and Order Parameter in FeSe_{0.4}Te_{0.6}
• Evolution from incoherent to coherent electronic states and its implications to superconductivity in FeTe1-xSex
• ARPES measurements of the superconducting gap of Fe-based superconductors and their implications to the pairing mechanism
• Imaging the Electron-Boson Coupling in Superconducting FeSe
• Magnetic excitations of Fe_{1+y}Se_xTe_{1-x} in magnetic and superconductive phases
• Evidence for Orbital Order and its Relation to Superconductivity in FeSe0.4Te0.6
• Odd parity pairing and nodeless anti-phase $s^{\pm }$ in Iron-Based Superconductors
• Neutron spin resonance in the 112-type iron-based superconductor
• Effect of electron correlations on the electronic structure and phase stability of FeSe upon lattice expansion
• Normal-State Hourglass Dispersion of the Spin Excitations in FeSe${}_x$Te${}_{1-x}$
• Spin anisotropy of the resonance in superconducting FeSe0.5Te0.5
• Bulk electronic structure of optimally doped Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Correlation strength, Lifshitz transition and the emergence of a two- to three-dimensional crossover in FeSe under pressure
• Polarized neutron scattering studies of magnetic excitations in electron-overdoped superconducting BaFe${}_{1.85}$Ni${}_{0.15}$As${}_2$
• Coupling of electronic and magnetic properties in Fe1+y(Te1-xSex)
• Spin fluctuations and superconductivity in powders of Fe_1+xTe_0.7Se_0.3 as a function of interstitial iron concentration
• Evidence for local moment magnetism in superconducting FeTe0.35Se0.65
• Nematic order in the vicinity of a vortex in superconducting FeSe
• LDA+DMFT approach to ordering phenomena and the structural stability of correlated materials
• Spin-fluctuations in Ti${}_{60}$V${}_{40}$ alloy and its influence on the superconductivity
• Time-reversal symmetry breaking state near the surface of $s_{\pm }$-superconductor
• Strong coupling to magnetic fluctuations in the charge dynamics of Fe-based superconductors
• Spin fluctuations away from (pi,0) in the superconducting phase of molecular-intercalated FeSe
• Magnetism and superconductivity in Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$
• How robust the global measurements of London penetration depth are: the case of Fe(Te${}_{1-x}$,Se${}_x$)
• Effect of nodes, ellipticity and impurities on the spin resonance in Iron-based superconductors
• Effect of gap anisotropy on the spin resonance peak in the superconducting state of iron-based materials
• In-plane magnetic field effect on the neutron spin resonance in optimally doped FeSe${}_{0.4}$Te${}_{0.6}$ and BaFe${}_{1.9}$Ni${}_{0.1}$As${}_2$ superconductors
• Superconductivity in PbO-type Fe chalcogenides
• Disorder effects in pnictides : a tunneling spectroscopy study
• Correlated electronic structure, orbital-dependent correlations, and Lifshitz transition in tetragonal FeS
• Thermal evolution of antiferromagnetic correlations and tetrahedral bond angles in superconducting FeTe${}_{1-x}$Se${}_x$
• Disorder-dependent superconducting phase-diagram at high magnetic fields in Fe${}_{1+y}$Se${}_x$Te${}_{1-x}$ ($x\sim 0.4$)
• Magnetic hour-glass dispersion and its relation to high-temperature superconductivity in iron-tuned Fe${}_{1+y}$Te${}_{0.7}$Se${}_{0.3}$
• Common origin of the two types of magnetic fluctuations in iron chalcogenides
• Magnetic order tuned by Cu substitution in Fe1.1-zCuzTe
• Proximity fingerprint of s+- superconductivity
• Origin of doping-induced suppression and reemergence of magnetism in LaFeAsO${}_{1-x}$H${}_x$
• Magnetic phase transitions and superconductivity in strained FeTe
• Signatures of pairing in the magnetic excitation spectrum of strongly correlated ladders
• Determination of the pairing state in iron-based superconductors through neutron scattering
• Dimensionality, nematicity and Superconductivity in Fe-based systems
• Optical properties of the iron-chalcogenide superconductor FeTe0.55Se0.45
• 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
• Exploration of iron-chalcogenide superconductors
• Temperature dependence of the resonance and low energy spin excitations in superconducting FeTe${}_{0.6}$Se${}_{0.4}$
• Nano-scale Inhomogeneous Superconductivity in Fe(Te1-xSex) Probed by Nanostructure-transport
• Low energy magnetic excitations from the Fe${}_{1+y-z}$(Ni/Cu)${}_z$Te${}_{1-x}$Se${}_x$ system
• Physics picture from neutron scattering study on Fe-based superconductors
• Magnetic neutron scattering studies on the Fe-based superconductor system Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$
• Anisotropic effect of a magnetic field on the neutron spin resonance in FeSe
• Two-Fluid Description for Iron-Based Superconductors
• Enhanced spin ordering temperature in ultrathin FeTe films grown on a topological insulator
• Theory of Mixed-State Effect on Quasiparticle Interference in Iron-based Superconductors
• Magnetism and Superconductivity of S-substituted FeTe
• Substitution of Ni for Fe in superconducting Fe${}_{0.98}$Te${}_{0.5}$Se${}_{0.5}$ depresses the normal-state conductivity but not the magnetic spectral weight
• A Triplet Resonance in Superconducting FeSe0.4Te0.6
• Evidence of electron interaction with an unidentified bosonic mode in superconductor CsCa${}_2$Fe${}_4$As${}_4$F${}_2$
• Pressure induced renormalization of energy scales in the unconventional superconductor FeTe0.6Se0.4
• Nodeless two-gap superconductivity in stoichiometric iron pnictide LiFeAs
• Unexpected Enhancement of Three-Dimensional Low-Energy Spin Correlations in Quasi-Two-Dimensional Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$ System at High Temperature
• Q-scan-analysis of the neutron scattering in iron-based superconductors
• Electronic structure of ruthenium-doped iron chalcogenides
• Interplay of structure, magnetism, and superconductivity in Se substituted iron telluride with excess Fe
• Photoinduced nematic state in FeSe${}_{0.4}$Te${}_{0.6}$
• Superconductivity and phonon self-energy effects in Fe${}_{1+y}$Te${}_{0.6}$Se${}_{0.4}$
• Enhanced low-energy magnetic excitations evidencing the Cu-induced localization in an Fe-based superconductor Fe${}_{0.98}$Te${}_{0.5}$Se${}_{0.5}$
• Effect of pairing fluctuations on the spin resonance in Fe-based superconductors
• Ferromagnetic inter-layer coupling in FeSe${}_{1-x}$S${}_x$ superconductors revealed by inelastic neutron scattering
• Magnetic softness in iron-based superconductors
• Preformed Cooper Pairs in a Triclinic Iron Pnictide Superconductor
• Correlation between Fermi surface reconstruction and superconductivity in pressurized FeTe0.55Se0.45
• Spin fluctuations in the 112-type iron-based superconductor Ca${}_{0.82}$La${}_{0.18}$Fe${}_{0.96}$Ni${}_{0.04}$As${}_2$
• Anisotropic Thermal Transport in Superconductors with Coexisting Spin Density Waves
• Unified Spin Model for Magnetic Excitations in Iron Chalcogenides
• Q Dependence of Magnetic Resonance Mode on FeTe${}_{0.5}$Se${}_{0.5}$ Studied by Inelastic Neutron Scattering
• Mixed-State Effect on the Low-Energy Spin Dynamics in Optimally-doped Iron Pnictide Superconductors
• Tetragonal-phase SnOFeSe: A possible parent compound of FeSe-based superconductor
• Ground and Applied-Field-Driven Magnetic States of Antiferromagnets