Reduction of the low-temperature bulk gap in samarium hexaboride under high magnetic fields

S. Wolgast, Y. S. Eo, K. Sun +5

SmB${}_6$ exhibits a small (15-20 meV) bandgap at low temperatures due to hybridized $d$ and $f$ electrons, a tiny (3 meV) transport activation energy $(E_A)$ above 4 K, and surfac…