Anisotropic and quasipropagating spin excitations in superconducting Ba(Fe0.926Co0.074)2As2

Abstract

Inelastic neutron scattering from superconducting (SC) Ba(Fe${}_{0.926}$Co${}_{0.074}$)${}_2$As${}_2$ reveals anisotropic and quasi-two-dimensional (2D) magnetic excitations close to \textbf{Q}${}_{\text{AFM}}=(12/12)$ - the 2D antiferromagnetic (AFM) wave-vector of the parent BaFe${}_2$As${}_2$ compound. The correlation length anisotropy of these low energy fluctuations is consistent with spin nematic correlations in the $J_1$-$J_2$ model with $J_1/J_2\sim$ 1. The spin resonance at $\sim$8.3 meV in the SC state displays the same anisotropy. The anisotropic fluctuations experimentally evolve into two distinct maxima only along the direction transverse to \textbf{Q}${}_{\text{AFM}}$ above $\sim$80 meV indicating unusual quasi-propagating excitations.

4 Pages, 4 Figures, Rapid Communications, Editor's Suggestions

References in corpus (15)

• Superconductivity at 43 K in Samarium-arsenide Oxides $SmFeAs{O}_{1-x}{F}_x$
• Theory of Electron Nematic Order in LaOFeAs
• Effects of Co substitution on thermodynamic and transport properties and anisotropic $H_{c2}$ in Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ single crystals
• Ising and Spin orders in Iron-based Superconductors
• Normal-State Spin Dynamics and Temperature-Dependent Spin Resonance Energy in an Optimally Doped Iron Arsenide Superconductor
• Effects of nematic fluctuations on the elastic properties of iron arsenide superconductors
• Two-dimensional resonant magnetic excitation in BaFe1.84Co0.16As2
• Spin Gap and Resonance at the Nesting Wavevector in Superconducting FeSe0.4Te0.6
• Three-dimensional Resonance in superconducting BaFe${}_{1.9}$Ni${}_{0.1}$As${}_2$
• Itinerant magnetic excitations in antiferromagnetic CaFe2As2
• Evolution of spin excitations into the superconducting state in FeTe1-xSex
• Theory of itinerant magnetic excitations in the SDW phase of iron-based superconductors
• Paramagnetic Spin Correlations in CaFe2As2 Single Crystals
• Dispersive Spin Fluctuations in the near optimally-doped superconductor Ba(Fe1-xCox)2As2 ($x$=0.065)
• Anisotropic Neutron Spin Resonance in Superconducting BaFe${}_{1.9}$Ni${}_{0.1}$As${}_2$

Cited by in corpus (47)

• Superconductivity in Iron Compounds
• Magnetism and its microscopic origin in iron-based high-temperature superconductors
• Preemptive nematic order, pseudogap, and orbital order in the iron pnictides
• Iron based superconductors: magnetism, superconductivity and electronic structure
• In-plane electronic anisotropy of underdoped "122" Fe-arsenide superconductors revealed by measurements of detwinned single crystals
• Nature of magnetic excitations in superconducting BaFe${}_{1.9}$Ni${}_{0.1}$As${}_2$
• Persistent high-energy spin excitations in iron pnictide superconductors
• Measurement of the elastoresistivity coefficients of the underdoped iron-arsenide Ba(Fe${}_{0.975}$Co${}_{0.025}$)${}_2$As${}_2$
• Incommensurate spin fluctuations in hole-overdoped superconductor KFe2As2
• Superconductivity, Antiferromagnetism, and Neutron Scattering
• Incommensurate magnetic excitations in superconducting LiFeAs
• Splitting of resonance excitations in nearly optimally doped Ba(Fe0.94Co0.06)2As2: an inelastic neutron scattering study with polarization analysis
• One-Fe versus Two-Fe Brillouin Zone of Fe-Based Superconductors: Creation of the Electron Pockets via Translational Symmetry Breaking
• Suppression of superconductivity by Neel-type magnetic fluctuations in the iron pnictides
• Competition between stripe and checkerboard magnetic instabilities in Mn-doped BaFe2As2
• Electron doping evolution of the anisotropic spin excitations in BaFe2-xNixAs2
• Electron doping evolution of the magnetic excitations in BaFe2-xNixAs2
• Evidence for Orbital Order and its Relation to Superconductivity in FeSe0.4Te0.6
• Neutron-scattering measurements of the spin excitations in LaFeAsO and Ba(Fe${}_{0.953}$Co${}_{0.047}$)${}_2$As${}_2$: Evidence for a sharp enhancement of spin fluctuations by nematic order
• Magnetic excitations in underdoped Ba(Fe1-xCox)2As2 with x=0.047
• Spectral analysis for the iron-based superconductors: Anisotropic spin fluctuations and fully gapped s^{\pm}-wave superconductivity
• Incommensurate antiferromagnetic order in the manifoldly-frustrated SrTb${}_2$O${}_4$ with transition temperature up to 4.28 K
• Spin Dynamics of a $J_1-J_2$ Antiferromagnet and its Implications for Iron Pnictides
• Anisotropy of incommensurate magnetic excitations in slightly overdoped Ba${}_{0.5}$K${}_{0.5}$Fe${}_2$As${}_2$ probed by polarized inelastic neutron scattering experiments
• Magnonlike dispersion of spin resonance in Ni-doped BaFe${}_2$As${}_2$
• A comprehensive review on the ferroelectric orthochromates: Synthesis, property, and application
• Electron doping evolution of the magnetic excitations in NaFe${}_{1-x}$Co${}_x$As
• Commensurate antiferromagnetic ordering in Ba(Fe{1-x}Co{x})2As2 determined by x-ray resonant magnetic scattering at the Fe K-edge
• Crossover from spin-waves to diffusive spin excitations in underdoped Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Experimental elucidation of the origin of the `double spin resonances' in Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Distinct itinerant spin-density waves and local-moment antiferromagnetism in an intermetallic ErPd${}_2$Si${}_2$ single crystal
• Electronic structure in one-Fe Brillouin zone of iron-pnictide superconductor CsFe${}_2$As${}_2$
• 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
• The influence of spin fluctuations on the thermal conductivity in superconducting Ba(Fe_{1-x}Co_x)_2As_2
• Emergent Nesting of the Fermi Surface from Local-Moment Description of Iron-Pnictide High-Tc Superconductors
• Anisotropic magnetoelastic coupling in single-crystalline CeFeAsO as seen via high-resolution x-ray diffraction
• Effect of electron correlations on spin excitation bandwidth in Ba${}_{0.75}$K${}_{0.25}$Fe${}_2$As${}_2$ as seen via time-of-flight inelastic neutron scattering
• Anisotropic magnetic excitations of a frustrated bilinear-biquadratic spin model -- Implications for spin waves of detwinned iron pnictides
• Anisotropic inplane spin correlation in the parent and Co-doped BaFe2As2: a neutron scattering study
• Temperature-dependent structure of an intermetallic ErPd${}_2$Si${}_2$ single crystal: A combined synchrotron and in-house X-ray diffraction study
• Magnetoelastic coupling and charge correlation lengths in a twin domain of Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ ($x=0.047$): A high-resolution X-ray diffraction study
• Insights into the structural symmetry of single-crystal YCrO${}_3$ from synchrotron X-ray diffraction
• Spin fluctuations in the 112-type iron-based superconductor Ca${}_{0.82}$La${}_{0.18}$Fe${}_{0.96}$Ni${}_{0.04}$As${}_2$
• Effects of Long-Range Interactions on Magnetic Excitations and Phase Transition on a Magnetically Frustrated Square Lattice
• Ground and Applied-Field-Driven Magnetic States of Antiferromagnets
• Mixed-State Effect on the Low-Energy Spin Dynamics in Optimally-doped Iron Pnictide Superconductors