APS -APS March Meeting 2017 - Event - Symmetry Rules Shaping Spin-Orbital Textures in Surface States

摘要

A complete understanding of a surface state subject to strong spin-orbit coupling requires mapping all of its key degrees of freedom. We study topological insulators using spin- and angle-resolved photoemission to elucidate the rules that couple an orbital texture to a spin texture. From this, we demonstrate where in a material's band structure one should expect an orbital-dependent spin texture, and where a surface state can have a single, orbital-independent spin texture.