Magnetic excitation in the Ni-overdoped BaFe$_{2}$As$_{2}$

ORAL

Abstract

We use neutron scattering to systematically investigate the evolution of spin excitations in Ni-doped BaFe2As2.~ Previous works on underdoped and optimally doped materials have found evidence for spin gap and neutron spin resonance.~ We use flux method to grow overdoped material approaching to the nonsuperconducting regime.~ We have carried out inelastic neutron scattering measurements on spin and lattice excitations of the overdoped BaFe$_{1.8}$Ni$_{0.2}$As$_{2}$ ($T_{c} \quad \sim $5 K) and the outcome of these investigations will be report.

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Authors

  • Chenglin Zhang

    University of Tennessee, U of Tennessee, Univ of Tennessee, physics dept

  • Huiqian Luo

    Chinese Academy of Science, Institute of Physics, China, Institute of Physics, CAS

  • Meng Wang

    Institute of Physics, China, Chinese Academy of Science, University of Tennessee; Institute of Physics, China, Institute of Physics, CAS

  • Shiliang Li

    Chinese Academy of Science, IOP,CAS, Institute of Physics, CAS

  • Zhiguo Chen

    Institute of Physics, CAS

  • Wei Wu

    Institute of Physics, CAS

  • Jianlin Luo

    Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Institute of Physics, CAS

  • Nanlin Wang

    Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, IOP, CAS, Institute of Physics, Chinese Academy of Sciences, Institute of Physics, CAS

  • Pengcheng Dai

    UTK/ORNL, University of Tennessee, U of Tennessee, University of Tennessee; Oak Ridge National Laboratory; Institute of Physics, China, Univ. of Tenn., Univ of Tennessee, physics dept