Thin films of topological Kondo insulator candidate SmB₆: Strong spin-orbit torque without exclusive surface conduction.

ABSTRACT: The advent of topological insulators (TIs), a novel class of materials that harbor a metallic spin-chiral surface state coexisting with band-insulating bulk, opens up new possibilities for spintronics. One promising route is current-induced switching of an adjacent magnetic layer via spin-orbit torque (SOT), arising from the large spin-orbit coupling intrinsically possessed by TIs. The Kondo insulator SmB₆ has been recently proposed to be a strongly correlated TI, supported by the observation of a metallic surface state in bulk SmB₆, as evidenced by the thickness independence of the low-temperature resistance plateau. We report the synthesis of epitaxial (001) SmB₆/Si thin films and a systematic thickness-dependent electrical transport study. Although the l

SUBMITTER: Li Y 

PROVIDER: S-EPMC5777401 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature