2011/07/12 by Christoph Brüne, C. Brüne, Andreas Roth +9 · 5 citations
Materials Science · Physics and Astronomy · #Condensed matter physics #Electron #Graphene research and applications #Physics #Quantum Hall effect #Quantum and electron transport phenomena #Quantum mechanics #Quantum spin Hall effect #Spin (aerodynamics) #Spin Hall effect #Spin engineering #Spin polarization #Topological Materials and Phenomena #cond-mat.mes-hall #cond-mat.mtrl-sci
paper · pdf · doi:10.1038/nphys2322
published as Nature Physics 8, 486 (2012) · version 2: supplementary material with additional three figures added. In total 27 pages, 8 figures
arxiv created 2011/07/12 · openalex publication_date 2012/05/27 · arxiv updated 2012/06/05 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
While the helical character of the edge channels responsible for charge transport in the quantum spin Hall regime of a two-dimensional topological insulator is by now well established, an experimental confirmation that the transport in the edge channels is spin-polarized is still outstanding. We report experiments on nanostructures fabricated from HgTe quantum wells with an inverted band structure, in which a split gate technique allows us to combine both quantum spin Hall and metallic spin Hall transport in a single device. In these devices, the quantum spin Hall effect can be used as a spin current injector and detector for the metallic spin Hall effect, and vice versa, allowing for an all-electrical detection of spin polarization.