Spin-transport & Nanomagnetism
In recent years, a multitude of novel devices has been proposed, which rely on the dynamic interplay between spin, charge and other degrees of freedom in magnetic nanostructures. Prominent, examples include spin-orbit and spin-transfer torque systems as well as optical, magnonic, caloritronic and spin-hall devices. Here, we explore the fundamental nature and the origin of magnetism and spin-interactions in model systems with dimension in the atomic- and molecular scale as well as hybrid mesoscopic devices with length scales up to few hundred nanometers.
Current Research Projects
Correlation of Electronic Transport and THz Spectroscopy in Nanostructures
THz Photomixers at low temperatures allow simuoltanious THz spectroscopy and transport measurements on nanostructures. Independent modulation of the bias and the THz intensity are used to correlate electronic and spectroscopic phenomena.
Electronic transport and magnetisation effects in atomic-scale transition materials
This project aims the better understanding of magnetic ordering processes in some transition metals at the atomic scale. Due to the local nature of the magnetically ordered state, parasitic influences of the environment are removed and the system enables the study of magnetism on the atomic scale.
Transport and magnetodynamics in spin-torque nano-oscillator microarrays
The coupling of spin with charge, lattice and other degrees of freedom in hybrid nanostructures provides access to a wealth of fascinating phenomena. For example, ultra-miniaturized and highly tunable microwave sources exploiting the transfer of angular momentum to a local magnetization are designed in this project.
THz spin-flip radiation sources based on magnetic point contacts
This project aims at the generation of THz radiation from spin-flip processes in magnetic point contacts between a strong and a dilute ferromagnet.