Spin-space anisotropy in over-doped Ba(Fe1-xCox)2As2
Several polarised inelastic neutron scattering experiments on doped BaFe2As2 revealed that the so-called resonance mode actually consists of two components: a low-energy peak that is anisotropic in spin-space and a broader isotropic feature at higher energy. Therefore, the resonance enhanced scattering in the superconducting state bears astonishing similarity with the anisotropy of the antiferromagnetic gaps in the parent compound. For hole-doping far beyond the suppression of static AFM order, the anisotropic feature clearly persists. However, for Co and thus electron doping a comparable study still lacks. (Continuation of CRG2180 proposal)
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WASSER Florian; M. Braden; LEE Chul Ho; QURESHI Navid and STEFFENS Paul. (2016). Spin-space anisotropy in over-doped Ba(Fe1-xCox)2As2. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-02-478
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