Dispersive spin fluctuations in the nearly optimally doped superconductorBa(Fe1−xCox)2As2(x=0.065)

2009/12/31 by C. Lester, Jiun‐Haw Chu, Jiun-Haw Chu +5 · 87 citations
Business, Management and Accounting · Materials Science · Physics and Astronomy · #Algorithm #Computer science #Condensed matter physics #Database #Doping #Information retrieval #Intellectual Capital and Performance Analysis #Iron-based superconductors research #Physics #Rare-earth and actinide compounds #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.81.064505

published in Physical Review B 81(6) (American Physical Society) · Final version

openalex publication_date 2010/02/16 · arxiv created 2010/02/26 · arxiv updated 2010/03/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Inelastic neutron scattering is used to probe the collective spin excitations of the near optimally doped superconductor Ba(Fe_1\ensuremath-xCo_x)₂As₂ (x=0.065). Previous measurements on the antiferromagnetically ordered parents of this material show a strongly anisotropic spin-wave velocity. Here we measure the magnetic excitations up to 80 meV and show that a similar anisotropy persists for superconducting compositions. The dispersive mode measured here connects directly with the spin resonance previously observed in this compound. When placed on an absolute scale, our measurements show that the local- or wave-vector-integrated susceptibility is larger in magnitude than that of the ordered parents over the energy range probed.

Citations

• High-energy spin excitations inBaFe2As2observed by inelastic neutron scattering
• Two-dimensional resonant magnetic excitation inBaFe1.84Co0.16As2
• Itinerant Magnetic Excitations in AntiferromagneticCaFe2As2
• Theory of electron nematic order in LaFeAsO
• A key role for unusual spin dynamics in ferropnictides
• Two energy scales in the spin excitations of the high-temperature superconductor La2−xSrxCuO4
• Multiband magnetism and superconductivity in Fe-based compounds
• Theory of magnetic excitations in iron-based layered superconductors
• Experimental observables near a nematic quantum critical point in the pnictide and cuprate superconductors
• In-plane anisotropy of spin excitations in the normal and superconducting states of underdoped YBa₂Cu₃O_6+x
• Superconductivity at 22 K in Co-DopedBaFe2As2Crystals
• Origin of the 150-K Anomaly in LaFeAsO: Competing Antiferromagnetic Interactions, Frustration, and a Structural Phase Transition

Cited by

• Effect of Li-deficiency impurities on the electron-overdoped LiFeAs superconductor
• Spectral analysis for the iron-based superconductors: Anisotropic spin fluctuations and fully gappeds±-wave superconductivity
• Revealing the degree of magnetic frustration by non-magnetic impurities
• Electron doping evolution of the magnetic excitations inNaFe1−xCoxAs
• Microstructural evolution throughout the structural transition in 1111 oxypnictides