2012/01/31 by Yuki Nagai, Kazuhiko Kuroki
Business, Management and Accounting · Materials Science · Physics and Astronomy · #Corporate Taxation and Avoidance #Iron-based superconductors research #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.85.134521
published as Phys. Rev. B 85, 134521 (2012) · 7 pages, 7 figures, resubmitted version. arXiv admin note: text overlap with arXiv:1103.0586
openalex publication_date 2012/04/19 · arxiv created 2012/05/28 · arxiv updated 2012/05/29 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We propose a way to determine the pairing state of the iron pnictide superconductors exploiting the momentum (\mathbitQ) scan of the neutron scattering data. We investigate the spin susceptibility in the s_\ifmmode±\else\textpm\fi and s++ superconducting states for various doping levels using the effective five-orbital model and considering the quasiparticle damping. The peak position of the intensity shifts from the position on the line Qx=\ensuremathπ to that on the line Qy=0 as the doping level is decreased from electron doping to hole doping. We find that the \mathbitQ dependence of the ratio of the intensity in the superconducting state to that in the normal state is qualitatively different between the s_\ifmmode±\else\textpm\fi-wave and s++-wave pairings. We propose to investigate experimentally this ratio in Q space to distinguish the two pairing states.