  Neodymium nickelate, NdNiO3 attracts attraction due to the simultaneous
occurrence of several phase transitions around the same temperature. The
electronic properties of NdNiO3 are extremely complex as structural distortion,
electron correlation, charge ordering, and orbital overlapping play significant
roles in the transitions. We report the effects of electron and hole injection
via doping a single 3d metal, V, in the NdNiO3 nanostructures to understand the
variations in the electronic properties without any structural distortion. A
reversible resistivity modulation more than five orders of magnitude via hole
doping and complete suppression of metal to insulator transition via electron
doping is observed along with the switching of major charge carriers. The
modulation of electronic properties without any structural distortion and
external strain opens up new directions to consider the NdNi1_xVxO3
nanostructures applicable as emerging electronic devices.
