Absence of superconductivity in hole-doped BaFe2−xCrxAs2 single crystals

We investigate the physical properties and electronic structure upon Cr doping in the iron arsenide layers of BaFe2As2. This form of hole doping leads to suppression of the magnetic/structural phase transition in BaFe2−xCrxAs2 for x>0, but does not lead to superconductivity. For x≤0.75 values, temperature dependence of the resistivity, specific heat, magnetic susceptibility, Hall coefficient, and single-crystal x-ray diffraction data are …