2013/07/31 by T. Urata, Takahiro Urata, Y. Tanabe +10 · 11 citations
Materials Science · Physics and Astronomy · #Anderson impurity model #Condensed matter physics #Dirac (video compression format) #Dirac fermion #Fermion #Impurity #Iron-based superconductors research #Kondo effect #Magnetic field #Magnetoresistance #Physics #Quantum mechanics #Rare-earth and actinide compounds #Scattering #Topological Materials and Phenomena #cond-mat.mtrl-sci #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.89.024503
published in Physical Review B 89(2) (American Physical Society) · 7page, 6figures
openalex publication_date 2014/01/13 · arxiv created 2014/01/14 · arxiv updated 2014/01/15 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The effect of Mn substitution, acting as a magnetic impurity for Fe, on the Dirac cone was investigated in Ba(Fe_1\ensuremath-xMnxAs)2. Both magnetoresistance and Hall resistivity studies clearly indicate that the cyclotron effective mass (m*) of the Dirac cone is anomalously enhanced at low temperatures by the impurity, although its evolution as a function of carrier number proceeds in a conventional manner at higher temperatures. Kondo-like band renormalization induced by the magnetic impurity scattering is suggested as the most plausible explanation for this, and the anomalous mass enhancement of the Dirac fermions is discussed.