EPL Association, European Physical Society Letters, 4(103), p. 47004
DOI: 10.1209/0295-5075/103/47004
Full text: Unavailable
We used angle-resolved photoemission spectroscopy (ARPES) and density functional theory calculations to study the electronic structure of $\text{Ba(Fe}_{1-x-y}\text{Co}_{x}\text{Mn}_{y})_{2}\text{As}_{2}$ for $x=0.06$ and $0\le y \le 0.07$ . From ARPES we derive that the substitution of Fe by Mn does not lead to hole doping, indicating a localization of the induced holes. An evaluation of the measured spectral function does not indicate a diverging effective mass or scattering rate near optimal doping. Thus, the present ARPES results indicate a continuous evolution of the quasiparticle interaction and therefore question previous quantum critical scenarios.