TY  - JOUR
AB  - Two-dimensional topological insulators possess two counter propagating edge channels with opposite spin direction. Recent experimental progress allowed to create ferromagnetic topological insulators realizing a quantum anomalous Hall (QAH) state. In the QAH state one of the two edge channels disappears due to the strong ferromagnetic exchange field. We investigate heterostructures of topological insulators and ferromagnetic topological insulators by means of numerical transport calculations. We show that spin current flow in such heterostructures can be controlled with high fidelity. Specifically, we propose spintronic devices that are capable of creating, switching and detecting pure spin currents using the same technology. In these devices electrical currents are directly converted into spin currents, allowing a high conversion efficiency. Energy independent transport properties in combination with large bulk gaps in some topological insulator materials may allow operation even at room temperature.
DA  - 2016
DO  - 10.1038/srep36070
LA  - eng
IS  - 1
PY  - 2016
SN  - 2045-2322
T2  - SCIENTIFIC REPORTS
TI  - Pure spin current devices based on ferromagnetic topological insulators
UR  - https://nbn-resolving.org/urn:nbn:de:0070-pub-29070304
Y2  - 2024-11-22T13:34:35
ER  -