2010/01/31 by Peng Cheng, Bing Shen, Jiangping Hu +2 · 3 citations
Business, Management and Accounting · Chemistry · Materials Science · Physics and Astronomy · #Analytical Chemistry (journal) #Chemistry #Condensed matter physics #Corporate Taxation and Avoidance #Doping #Electrical resistivity and conductivity #Hall effect #Impurity #Intellectual Capital and Performance Analysis #Iron-based superconductors research #Magnetic field #Magnetoresistance #Materials science #Optics #Physics #Quantum mechanics #Residual resistivity #Scattering #Superconductivity #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.81.174529
published as Phys. Rev. B 81, 174529 (2010) · 7 pages, 7 figures, PRB in press
arxiv created 2010/05/05 · openalex publication_date 2010/05/25 · arxiv updated 2015/05/14 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Resistivity, Hall effect, magnetoresistance and dc magnetization were measured in Mn- and Zn-doped Ba0.5K0.5Fe2As2 samples. It is found that the Mn doping can depress the superconducting transition temperature drastically with a rate of \ensuremathΔTc/Mn-1%=\ensuremath-4.2 K, while that by Zn doping is negligible. Detailed analysis reveals that the Mn doping enhances the residual resistivity (\ensuremathρ0) significantly, and induces strong local magnetic moments (\ensuremath∼2.58\ensuremathμB) which play as pair breakers. While the impurity scattering measured by \ensuremathρ0 in the Zn-doped samples is much weaker, accompanied by a negligible pair-breaking effect. A possible explanation is that the impurity scattering by the Zn impurities are mainly small angle scattering (or small momentum transfer), therefore it cannot break the pairing induced by the interpocket scattering and thus affects the superconducting transition temperature weakly.