4 papers
Simulations on the influence of spatially-varying spin transport parameters on the measured spin lifetime in graphene non-local spin valves
Marc Drögeler, Frank Volmer, Christoph Stampfer +1
Spin transport properties of graphene non-local spin valve devices are typically determined from Hanle spin precession measurements by using a simplified solution of the one-dimens…
Spin lifetimes exceeding 12 nanoseconds in graphene non-local spin valve devices
Marc Drögeler, Christopher Franzen, Frank Volmer +7
We show spin lifetimes of 12.6 ns and spin diffusion lengths as long as 30.5 μm in single layer graphene non-local spin transport devices at room temperature. This is accomplished…
Growth, characterization, and transport properties of ternary (Bi1-xSbx)2Te3 topological insulator layers
C. Weyrich, M. Drögeler, J. Kampmeier +12
Ternary (Bi1-xSbx)2Te3 films with an Sb content between 0 and 100% were deposited on a Si(111) substrate by means of molecular beam epitaxy. X-ray diffraction measurements confirm…
Nanosecond spin lifetimes in bottom-up fabricated bilayer graphene spin-valves with atomic layer deposited AlO spin injection and detection barriers
Marc Drögeler, Frank Volmer, Maik Wolter +5
We present spin transport studies on bi- and trilayer graphene non-local spin-valves which have been fabricated by a bottom-up fabrication method. By this technique, spin injection…