Floating zone growth and electricity properties of topological Kondo insulator SmB6

摘要

Samarium hexaboride (SmB6) predicted to be a topological Kondo insulator, is the first strongly correlated heavy fermion material to exhibit topological surface states. In this work, the high quality SmB6 single crystal have been successfully grown by the floating zone method and the electrical transport at low temperature was measured at Oxford Instruments Heliox VL. The results show that the electrical resistivity displays a sharp increase below 20 K, which value is about 105 higher than that of room temperature. And the Hall resistivity, which is linear, yielding an n-type carrier concentration as indicated (low T regime).