Lemmens Group, Technische Universität Braunschweig
The expertise in the group of Prof. Peter Lemmens is related to the interplay of structure, magnetism and electronic properties of transition metal compounds and artificial materials. His aim is a better understanding of the critical behaviour of quantum magnetic, charge and orbital states in molecular or weakly coupled systems and their application in information and sensor technology. To reach this aim optical and ultrasound spectroscopy are performed. Transition metal compounds, nanoporous templates from oxides and semiconductors with adjustable length scales and periodicity are prepared. Metallic/magnetic nanowires are grown within the templates and tip-enhanced optical spectroscopy is implemented on these materials.
Prof. Peter Lemmens is one of the founders and a member of the steering committee of the European network ”Highly Frustrated Magnetism” (ESF-HFM). He had and has funding within several SFB’s, DFG Priority Programs, and several single projects. He is a Principal Investigator of the Braunschweig International Graduate School of Metrology. Interdisciplinary and applied research is performed using database mining in collaboration with chemists from Sweden (M. Johnsson, Stockholm) and Japan (H. Kageyama, Kyoto and others). Within the DFG Priority Program ”Molecular Magnetism” he has investigated intervalence charge transfer, spin state switching and spin coherence/exchange of molecular systems using optical spectroscopy and nanotemplated molecules, a topic relevant for this proposal.