2015/02/10 by Huaixiang Huang, Shilong Zhang, Shuchao Zhang +3 · 1 citation
Business, Management and Accounting · Materials Science · Physics and Astronomy · #Condensed matter physics #Corporate Taxation and Avoidance #Doping #Impurity #Iron-based superconductors research #Order (exchange) #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #cond-mat.supr-con
paper · pdf · doi:10.1016/j.physc.2015.02.002
published in Physica C Superconductivity 511, 33-37 (Elsevier BV) · 7 pages, 8 figures
openalex publication_date 2015/02/10 · arxiv created 2015/02/25 · arxiv updated 2015/02/26 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Effects of disorder on electron-doped iron pnictides are investigated systematically based on self-consistent Bogoliubov-de Gennes equations. Multiply impurities with same scattering potential (SP) are randomly distributed in a square lattice. Probability distribution functions of normalized order parameters for different impurity concentrations δimp, different electron doping concentrations δ are investigated for given SPs. Samples are found to be very robust against weak SP, in which order parameters do not have qualitative change even at very large δimp. While strong SP is able to easily break down the order parameters. For moderate SP, variations of order parameters on and around impurities strongly depend on δ, however the distribution functions of normalized order parameters have similar behavior as δimp increases. Compared with superconducting (SC) order, the magnetic order is more sensitive to multi-impurity effect. The spatial spin density wave pattern has already been destroyed before the system loses its superconductivity. Dependence of SC order on temperature is similar to that of impurity-free case, with the critical temperature being remarkably suppressed for high δimp.