  We investigate the chemical substitution of group 5 into BaFe2As2 (122) iron
arsenide, in the effort to understand why Fe-site hole doping of this compound
(e.g., using group 5 or 6) does not yield bulk superconductivity. We find an
increase in c-lattice parameter of the BaFe2As2 with the substitution of V, Nb,
or Ta; the reduction in c predicts the lack of bulk superconductivity [1] that
is confirmed here through transport and magnetization results. However, our
spectroscopy measurements find a coexistence of antiferromagnetic and local
superconducting nanoscale regions in V-122, observed for the first time in a
transition-metal hole-doped iron arsenide. In BaFe2As2, there is a complex
connection between local parameters such as composition and lattice strain,
average lattice details, and the emergence of bulk quantum states such as
superconductivity and magnetism. [1] L. M. N. Konzen, and A. S. Sefat, J.
Phys.: Condens. Matter 29 (2017), 083001.
