  We report experimental evidence of emergent broken symmetry Fermi liquid
state in an isolated single crystalline nanorod of $\rm Pr_2 Ir_2 O_7$. We find
clear signature of the onset of the Fermi liquid behavior at low temperature
marked by the sign inversion of magnetoresistance from negative at high
temperature, characteristic of incoherent Kondo scattering, to positive as well
as a $\rm T^2$ dependence of resistivity at low temperature. A resistive
anomaly is observed, which is accompanied by thermal hysteresis in the presence
of magnetic field, suggesting itinerant metamagnetism. The observed high field
negative magnetoresistance with quadratic field dependence at low temperature,
which is most likely due to suppression of itinerant spin fluctuation, and the
irreversibility of the magneto-resistive properties in the Fermi liquid regime
suggest existence of an unusual state with broken spin rotation and time
reversal symmetry, hallmark of `hastatic' order. The major features of such
temperature dependence of resistivity and magnetoresistance can be explained in
a phenomenological model incorporating two distinct hybridization channels,
which is physically consistent with the possibility of the formation of the
`hastatic' Fermi liquid phase.
