Spherical Polarization Analysis for Measuring Spin Hall Materials*

Topological Insulators (TI) combine charge order and spin-orbit coupling leading to an insulating bulk, yet topological surface conduction states. Here we present the results of polarized neutron scattering experiment(s) on single crystal of Bi2Se3, showing a cross-interaction of the polarized surface conduction states with the incident neutron beam polarization. This is significant as it could open possibilities of Topological Insulators being used as polarized neutron detectors and allow a novel probe for TI surface states.