Determination of the pairing state in iron-based superconductors through neutron scattering

Details Determination of the pairing state in iron-based superconductors through neutron scattering Determination of the pairing state in iron-based superconductors through neutron scattering

2011-03-03

arxiv.org/abs/1103.0586v2

Phys. Rev. B 83, 220516(R) (2011)

Physics

Condensed Matter

Superconductivity

5pages, 3 figures, Accepted in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.83.220516

We calculate the spin susceptibility in the s_{+-} and s_{++} superconducting states of the iron pnictides using the effective five orbital model and considering the quasiparticle damping. For the experimentally evaluated magnitude of the quasiparticle damping and the superconducting gap, the results at the wave vector ~ (pi,0) show that the s_{+-} state is more consistent with the neutron scattering experiments, while for larger quasiparticle damping and the superconducting gap, the s_{++} state can be more consistent. To distinguish between two cases that reproduce the experiments at the wave vector ~ (pi,0), we propose to investigate experimentally the wave vector ~ (pi,pi).

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