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PHYSIKALISCHES KOLLOQUIUM
Referent:
Prof. Dr. Sebastian T. B. Goennenwein
Institut für Festkörperphysik / Fachrichtung Physik,
Technische Universität Dresden,
Dresden
Antrittsvorlesung
Thema:
Spin Current Transport
Zeit und Ort:
Dienstag, 11.10.2016, 16:40 Uhr
Recknagel-Bau, Hörsaal REC/C213, Haeckelstr. 3
Leiter:
Sprecher der Fachrichtung Physik Prof. Dr. Roland Ketzmerick
Kurzfassung:
Pure spin currents – i. e., directed flows of spin angular momentum – are a fascinating
manifestation of spin physics in the solid state. Pure spin currents can propagate not only
in metals and semiconductors, but also in magnetically ordered insulators. This makes a
whole new set of materials and material combinations interesting for spin transport
experiments and spin-electronic devices. Moreover, in the last decade, robust
experimental schemes for the generation and/or detection of pure spin currents have
been established, sparking intense research activities. In ferromagnet/normal metal thin
film heterostructures for example, pure spin currents can be generated by means of spin
pumping, or via the application of thermal gradients in the so-called spin Seebeck effect.
An elegant concept for detecting spin currents relies on the inverse spin Hall effect:
Because of spin-orbit coupling, a pure spin current induces a charge current, which can
be measured using conventional electronics. The interplay between spin and charge
transport furthermore gives rise to the so-called spin Hall magnetoresistance (SMR) effect
[5], and allows for the electrical quantification of magnon diffusion lengths in magnetic
insulator/normal metal nanostructures. In the lecture, I will give an introduction to pure
spin current transport and spin Hall physics, and then address recent highlights as well
as interesting perspectives for pure spin current based experiments and spin current
circuits.
Kurzbiographie:
Sebastian T. B. Goennenwein graduated from Technische Universität München with a
PhD in physics in 2003. After a two-year post-doc stay at the Kavli Institute of
NanoScience in Delft (The Netherlands), he joined the Walther-Meissner-Institut of the
Bavarian Academy of Sciences in Garching, Germany, where he worked as a research
group leader and deputy director. In 2016, Sebastian Goennenwein was appointed full
professor at the Institut für Festkörperphysik, Technische Universität Dresden. His
current research addresses the fabrication and experimental investigation of
multifunctional hybrid nanostructures, with a focus on spin currents, spin dynamics, spin
textures, and spin-caloritronic phenomena.
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