skip to main content

Spin Excitation Anisotropy as a Probe of Orbital Ordering in the Paramagnetic Tetragonal Phase of Superconducting BaFe 1.904 Ni 0.096 As 2

Luo, Huiqian ; Wang, Meng ; Zhang, Chenglin ; Lu, Xingye ; Regnault, Louis-Pierre ; Zhang, Rui ; Li, Shiliang ; Hu, Jiangping ; Dai, Pengcheng

Physical Review Letters, 9/2013, Vol.111(10) [Periódico revisado por pares]

Texto completo disponível

Citações Citado por
  • Título:
    Spin Excitation Anisotropy as a Probe of Orbital Ordering in the Paramagnetic Tetragonal Phase of Superconducting BaFe 1.904 Ni 0.096 As 2
  • Autor: Luo, Huiqian ; Wang, Meng ; Zhang, Chenglin ; Lu, Xingye ; Regnault, Louis-Pierre ; Zhang, Rui ; Li, Shiliang ; Hu, Jiangping ; Dai, Pengcheng
  • Assuntos: Condensed Matter - Superconductivity ; Condensed Matter - Strongly Correlated Electrons
  • É parte de: Physical Review Letters, 9/2013, Vol.111(10)
  • Descrição: 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. Comment: 8 pages, 6 figures, with supplementary materials
  • Idioma: Inglês

Buscando em bases de dados remotas. Favor aguardar.