Magnetic Field Induced Fermi Liquid In a Candidate Topological Kondo Insulator*

Kondo insulators are expected to undergo an insulator-to-metal phase transition under strong magnetic fields. We show that Ce₃Bi₄Pd3 is a narrow gap Kondo insulator. Our high magnetic pulse-field transport and magnetization experiments reveal the destruction of Kondo coupling and the closing of the Kondo gap at a critical magnetic field, B_c ≈ 11 T. A Fermi liquid state emerges for fields beyond B_c, with a decrease in electronic correlations.