Triplett character of resonance modes in optimum-doped BaFe2As2
Polarized neutron experiments show that the resonance modes in FeAs-based superconductors are more complex than the mostly accepted picture of a bound singlet-triplet exciton. In the superconducting state many FeAs-based superconductors show an anisotropic low-energy resonance and a broad, isotropic high-energy feature. Further experiments are required to determine the character of these resonance modes. Here we propose to use a half-polarized setup with horizontal magnetic field that may unambiguously identify a triplet mode.
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WASSER Florian; M. Braden; BURGI Jakob; LEE Chul Ho; QURESHI Navid and STEFFENS Paul. (2018). Triplett character of resonance modes in optimum-doped BaFe2As2. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-02-497
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