  Kondo insulators are predicted to undergo an insulator-to-metal transition
under applied magnetic field, yet the extremely high fields required to date
have prohibited a comprehensive investigation of the nature of this transition.
Here we show that Ce3Bi4Pd3 provides an ideal platform for this investigation,
owing to the unusually small magnetic field of B ~ 11 T required to overcome
its Kondo insulating gap. Above Bc, we find a magnetic field-induced Fermi
liquid state whose characteristic energy scale T_FL collapses near Bc in a
manner indicative of a magnetic field-tuned quantum critical point. A direct
connection is established with the process of Kondo singlet formation, which
yields a broad maximum in the magnetic susceptibility as a function of
temperature in weak magnetic fields that evolves progressively into a sharper
transition at Bc as T -> 0.
