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We perform transport measurements and band structure calculations ofelectron-doped LaFeAsO1-xHx over a wide range of x from 0.01 to 0.66. The T^2and sqrt(T) dependency of the resistivity are observed at x ~ 0.17 and 0.41,respectively. The sign change of RH without opening of the spin-density-wavegap for 0.45 < x < 0.58 and T < TN as well as the calculated non-nested Fermisurface at x = 0.5 indicate the more localized nature of the AF2 as compared tospin density wave phase at non-doped sample. Considering the results from bandcalculations and the finite size of Hund' s rule coupling, the change of thenormal conducting state with x is reasonably explained by a strong depressionof the coherent scale owing to the increased effective Coulomb repulsion in thenarrow anti-bonding 3dxy band that approaches the half-filled regime. Thefollowing transition from the paramagnet to AF2 is understood as the quenchingor ordering of the less-screened spins with a large entropy at low temperature.These results suggest that the normal conducting properties over a wide dopingrange for the LaFeAsO1-xHx are strongly influenced by the local spins in theincoherent region. Thus, we conclude that the parent phase in LaFeAsO1-xHx isnot the spin-density wave but the AF2, which may be primarily responsible forthe singular superconducting properties of the 1111 type compared with otheriron pnictides.

Heavy Electron doping-induced antiferromagnetic phase as the parent for iron-oxypnictide superconductor LaFeAsO1-xHx