Prof. Sebastian Gönnenwein , TU Dresden
Antrittsvorlesung: Spin Current Transport
Recknagel - Bau , Hörsaal REC /C213 , Haeckelstr. 3 , 01069 Dresden
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 , 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.
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.