Inelastic Neutron-Scattering Measurements of a Three-Dimensional Spin Resonance in the FeAs-Based BaFe1.9Ni0.1As2 Superconductor
Songxue Chi, Astrid Schneidewind, Jun Zhao, Leland W. Harriger, Linjun Li, Yongkang Luo, Guanghan Cao, Zhu’an Xu, Micheal Loewenhaupt, Jiangping Hu, Pengcheng Dai
DOI 10.1103/PhysRevLett.102.107006 · Physical Review Letters
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We use inelastic neutron scattering to study magnetic excitations of the FeAs-based superconductor BaFe1.9Ni0.1As2 above and below its Tc (=20 K). In addition to gradually open a spin gap at the in-plane antiferromagnetic ordering wave vector (1, 0, 0), the effect of superconductivity is to form a three-dimensional resonance with clear dispersion along the c axis. The intensity of the resonance develops like a superconducting order parameter, and the mode occurs at distinctively different energies at (1, 0, 0) and (1, 0, 1). If the resonance energy is associated with the superconducting gap energy Δ, then Δ is dependent on the wave vector transfers along the c axis. These results suggest that one must be careful in interpreting the superconducting gap energies obtained by surface sensitive probes such as scanning tunneling microscopy and angle resolved photoemission.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| BaFe1.9Ni0.1As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 20.2 | Pressure not reported | onset |
| BaFe1.9Ni0.1As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 20.2 | Pressure not reported | onset |
| BaFe1.9Ni0.1As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 20 | Pressure not reported | unknown |
| Ba0.6K0.4Fe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 38 | Pressure not reported | unknown |
| CeFeAsO0.84F0.16 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 41 | Pressure not reported | unknown |
Similar papers
Effect of the in-plane magnetic field on the neutron spin resonance in optimally doped FeSe0.4Te0.6 and BaFe1.9Ni0.1As2 superconductors
similarity 0.97Shiliang Li et al.
Source status unknown — claims are unverified
Electron doping dependence of the anisotropic superconductivity in BaFe2−xNixAs2
similarity 0.96Zhaosheng Wang et al.
Source status unknown — claims are unverified
Neutron spin resonance as a probe of the superconducting energy gap of BaFe1.9Ni0.1As2 superconductors
similarity 0.96Jun Zhao et al.
Source status unknown — claims are unverified
Superconducting gap symmetry in the superconductor BaFe1.9Ni0.1As2
similarity 0.96T. E. Kuzmicheva et al.
Source status unknown — claims are unverified
Magnetic anisotropy in hole-doped superconducting Ba0.67K0.33Fe2As2 probed by polarized inelastic neutron scattering
similarity 0.95Chenglin Zhang et al.
Source status unknown — claims are unverified
Transition from Three-Dimensional Anisotropic Spin Excitations to Two-Dimensional Spin Excitations by Electron Doping the FeAs-Based BaFe1.96Ni0.04As2 Superconductor
similarity 0.95Leland W. Harriger et al.
Source status unknown — claims are unverified