TRR 227: Prof. Xin Fan "My Transversely-Polarized Spin Current Generation from Ferromagnetic Metals"
Prof. Xin Fan von der Universität in Denver, USA wird im Vortrag seine experimentellen Beobachtungen von zwei einzigartigen transversalen Spin-Bahn-Effekten vorstellen: 1) Spin-Ladungs-Umwandlung mit unkonventioneller Spin-Rotationssymmetrie; 2) die Erzeugung eines anomalen Spin-Bahn-Drehmoments in einem einschichtigen Magnetfilm.
My Transversely-Polarized Spin Current Generation from Ferromagnetic Metals
Xin Fan, University of Denver
The anomalous Hall effect, discovered by Edwin Hall in 1880, describes a phenomenon that an electric current perpendicular to magnetization of a magnetic material can produce a charge accumulation in the direction orthogonal to both electric current and magnetization. Through century-long theoretical and experimental efforts, it is now understood that the anomalous Hall effect arises from the spin-orbit coupling.
The understanding of the anomalous Hall effect has also led to the discovery of new spin-orbit effects, such as the spin Hall effect, where an electric current generates spin accumulations in nonmagnetic materials. The spin Hall effect also exists in ferromagnetic materials, in a more complicated and interesting way. There exist a group of spin-orbit effects associated with transverse spins – spins polarized perpendicular to the magnetization, which we refer to this group of spin-orbit effects as transverse-spin-orbit effects in magnetic materials.
In my talk, I will present our experimental observations of two unique transverse spin-orbit effects: (1) spin-to-charge interconversion with unconventional spin rotation symmetry and (2) the generation of anomalous spin-orbit torque in a single-layer magnetic film – a hidden counterpart to the anomalous Hall effect. I will also discuss the impact of these effects on the understanding of general spin-charge conversion phenomena.
Zeit & Ort
30.09.2022 | 14:15
Hörsaal A (Raum 1.3.14)
- ferromagnetic metals
- Ultrafast Spin Dynamics
- University of Denver
- Xin Fan