Spin excitation anisotropy as a probe of orbital ordering in the paramagnetic tetragonal phase of superconducting BaFe1.904Ni0.096As2

Abstract

We use polarized neutron scattering to demonstrate that in-plane spin excitations in electron doped superconducting BaFe1.904Ni0.096As2 (Tc=19.8 K) change from isotropic to anisotropic in the tetragonal phase well above the antiferromagnetic (AF) ordering and tetragonal-to-orthorhombic lattice distortion temperatures (Tn=Ts=33 K) without an uniaxial pressure. While the anisotropic spin excitations are not sensitive to the AF order and tetragonal-to-orthorhombic lattice distortion, superconductivity induces further anisotropy for spin excitations along the [1,1,0] and [1,-1,0] directions. These results indicate that the spin excitation anisotropy is a probe of the electronic anisotropy or orbital ordering in the tetragonal phase of iron pnictides.

8 pages, 6 figures, with supplementary materials

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• Nematic and meta-nematic transitions in the iron pnictides
• Spin-orbital frustrations and anomalous metallic state in iron-pnictide superconductors
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• Conductivity anisotropy in the antiferromagnetic state of iron pnictides
• Avoided quantum criticality and magnetoelastic coupling in BaFe${}_{2-x}$Ni${}_x$As${}_2$
• Effect of Co doping on the in-plane anisotropy in the optical spectrum of underdoped Ba(Fe1-xCox)2As2
• Orbital-weight redistribution triggered by spin order in the pnictides
• Anisotropic Neutron Spin Resonance in Superconducting BaFe${}_{1.9}$Ni${}_{0.1}$As${}_2$
• Polarized neutron scattering studies of magnetic excitations in electron-overdoped superconducting BaFe${}_{1.85}$Ni${}_{0.15}$As${}_2$

Cited by in corpus (48)

• Antiferromagnetic order and spin dynamics in iron-based superconductors
• Spin fluctuations in iron pnictides and chalcogenides: From antiferromagnetism to superconductivity
• Spin reorientation in Na-doped BaFe${}_2$As${}_2$ studied by neutron diffraction
• Vestigial chiral and charge orders from bidirectional spin-density waves: Application to the iron-based superconductors
• Uniaxial strain control of spin-polarization in multicomponent nematic order of BaFe${}_2$As${}_2$
• Spin reorientation driven by the interplay between spin-orbit coupling and Hund's rule coupling in iron pnictides
• Short-range cluster spin glass near optimal superconductivity in BaFe${}_{2-x}$Ni${}_x$As${}_2$
• Emergence of Orbital Nematicity in the Tetragonal Phase of BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$
• Prominent role of spin-orbit coupling in FeSe
• Odd and even modes of neutron spin resonance in the bilayer iron-based superconductor CaKFe${}_4$As${}_4$
• Robust Upward Dispersion of the Neutron Spin Resonance in the Heavy Fermion Superconductor Ce${}_{1-x}$Yb${}_x$CoIn${}_5$
• In-plane spin excitation anisotropy in the paramagnetic phase of NaFeAs
• Neutron spin resonance in the 112-type iron-based superconductor
• Coexistence of ferromagnetic and stripe antiferromagnetic spin fluctuations in SrCo${}_2$As${}_2$
• 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
• Spin Waves in Detwinned BaFe${}_2$As${}_2$
• Anisotropic neutron spin resonance in underdoped superconducting NaFe1-xCoxAs
• Incommensurate antiferromagnetic fluctuations in single-crystalline LiFeAs studied by inelastic neutron scattering
• Unravelling incommensurate magnetism and its emergence in iron-based superconductors
• 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
• Spin excitations in the nematic phase and the metallic stripe spin-density wave phase of iron pnictides
• Electronic structure and spin dynamics of ACo2As2 (A=Ba, Sr, Ca)
• Spin-Orbit Coupling and Magnetic Anisotropy in Iron-Based Superconductors
• Spin anisotropy due to spin-orbit coupling in optimally hole-doped Ba${}_{0.67}$K${}_{0.33}$Fe${}_2$As${}_2$
• Double magnetic resonance and spin anisotropy in Fe-based superconductors due to static and fluctuating antiferromagnetic orders
• In-plane uniaxial pressure-induced out-of-plane antiferromagnetic moment and critical fluctuations in BaFe${}_2$As${}_2$
• Field-induced nematic-like magnetic transition in an iron pnictide superconductor, Ca${}_{10}$(Pt${}_3$As${}_8$)((Fe${}_{1-x}$Pt${}_x$)${}_2$As${}_2$)${}_5$
• Electronic Nematicity Revealed by Torque Magnetometry in Iron Arsenide EuFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$
• Suppression of low-energy longitudinal spin-excitations in Co-underdoped BaFe2As2
• Preferred Spin Excitations in the Bilayer Iron-Based Superconductor CaK(Fe${}_{0.96}$Ni${}_{0.04}$)${}_4$As${}_4$ with Spin-Vortex Crystal Order
• Spin excitation anisotropy in optimal-isovalent-doped superconductor BaFe2(As0.7P0.3)2
• Quasi-2D behavior of 112-type iron-based superconductors
• Preferred magnetic excitations in Sr${}_{1-x}$Na${}_x$Fe${}_2$As${}_2$
• Strong Spin Resonance Mode associated with suppression of soft magnetic ordering in Hole-doped Ba1-xNaxFe2As2
• Orbital Nematic Order and Interplay with Magnetism in the Two-Orbital Hubbard Model
• Spin excitation anisotropy in the paramagnetic tetragonal phase of BaFe2 As2
• Spin-Excitations Anisotropy in the Bilayer Iron-Based Superconductor CaKFe${}_4$As${}_4$
• Anisotropic effect of a magnetic field on the neutron spin resonance in FeSe
• Nematicity, magnetic fluctuation and ferro-spin-orbital ordering in BaFe${}_2$As${}_2$ family
• Temperature and polarization dependence of low-energy magnetic fluctuations in nearly-optimal-doped NaFe${}_{0.9785}$Co${}_{0.0215}$As
• Nematic fluctuations in the non-superconducting iron pnictide BaFe${}_{1.9-x}$Ni${}_{0.1}$Cr${}_x$As${}_2$
• Superconductivity on the verge of electronic topological transition in Fe based superconductors
• Influence of orbital nematic order on spin responses in Fe-based superconductors
• Longitudinal modes of spin fluctuations in iron-based superconductors
• Preformed Cooper Pairs in a Triclinic Iron Pnictide Superconductor
• Magnetic excitations in the normal and nematic phases of iron pnictides
• Detecting the orbital character of the spin fluctuation in the Iron-based superconductors with the resonant inelastic X-ray scattering spectroscopy
• Eliminating Orbital Selectivity from the Metal-Insulator Transition by Strong Magnetic Fluctuations