Forschung

We aim to understand and control the electronic and spin degrees of freedom in compensated magnetic materials and their interplay with charge, symmetry, and light, and to exploit these mechanisms for novel spintronic functionalities. Our research focuses on collinear and noncollinear antiferromagnets as well as emerging altermagnets, which combine vanishing net magnetization with rich and unconventional transport properties.

As key tools, we develop and employ electrical and optical probes, including femtosecond laser excitation schemes, terahertz spectroscopy, magneto-thermoelectrical imaging, spin-orbit torque induced magnetic resonance and nonlinear transport measurements. These approaches allow us to access and manipulate spin dynamics on ultrafast time scales and to probe the hidden magnetic order of compensated magnets through electrical means.

Our work opens new directions toward energy-efficient, ultrafast spintronic devices, including nonvolatile memory, neuromorphic computing elements, and logic concepts based on compensated magnetism. By bridging fundamental understanding and device-oriented functionality, we contribute to the development of next-generation information technologies.

Interested in joining us? Please send an email to Jörg Wunderlich.

SFB 1277

Two subprojects both focused on imaging the antiferromagnetic order.

The first subproject exploits an effect that arises from an electric field-induced Berry curvature in Pt-symmetric systems and it is linked to the Néel vector direction. The goal is then to map the magnetic order in the PT-symmetric CuMnAs via the nonlinear anomalous Hall effect, which manifests itself as a photocurrent.
The second subproject aims at establishing an experimental platform for exploiting non-linear, spin-orbit-torque-driven dynamics in a synthetic antiferromagnet multilayer as a potential fundamental building block for future spintronic-based neuromorphic computing. We will combine high-frequency magnetotransport measurements with femtosecond nanoscale imaging approaches.

Cluster of Excellence “Center for Chiral Electronics” (CCE)

CCE will explore the unique potential of chirality in solid-state and molecular systems to develop next-generation electronic technologies.

Terahertz and DC nonlinear transport in twisted graphene and van der Waals hetero-structures

The project focus on nonlinear transport phenomena excited by terahertz radiation in twisted bilayer graphene and in 2D transition metal dichalcogenide / graphene bilayer heterostructures. Within this project, we will demonstrate that nonlinear transport can be used as a new and powerful method to access and characterize electronic and spin properties in 2D materials.

Our work is supported by

The German Science Foundation

funding projects SFB 1277, SPP 2558, Cluster of Excellence “Center for Chiral Electronics” and additional individual grants.

European Union’s Horizon 2020 research and innovation program

under the Marie Skłodowska-Curie Grant Agreement No. 861300 “Cold Opto-Magnetism for Random Access Devices”.

Czech Science Foundation

funding Project GACR 21-28876J.

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