New Helmholtz Young Investigator Group at HZB

Felix Büttner has set up a holography chamber at Brookhaven National Laboratory.

Felix Büttner has set up a holography chamber at Brookhaven National Laboratory. © privat

Dr. Felix Büttner will establish a Helmholtz Young Investigator Group (YIG) on topological solitons at the HZB beginning in March 2020. Topological solitons occur in magnetic quantum materials and can contribute to extremely energy-efficient switching processes. Büttner wants to develop a new imaging technique at BESSY II to study these quasi-particles.

Dr. Felix Büttner has received funding from the Helmholtz Association following a tough selection process. He will now build up his own research group, a Helmholtz Young Investigator Group (YIG).

Until now, he was doing research as a postdoc at the Massachusetts Institute of Technology in Cambridge, MA, USA.  Büttner has already distinguished himself with numerous publications in the field of magnetic quantum materials.

At the HZB, he wants to develop a new high-resolution technique at the BESSY II synchrotron source that will enable the imaging of complex magnetic structures under realistic conditions at room temperature.

He will focus on antiferromagnetic topological solitons that occur in certain materials and are considered important candidates for extremely energy-efficient data storage. “There has been little progress in antiferromagnetic soliton research so far due to a lack of high-resolution imaging techniques that can detect antiferromagnetic topological solitons in actual devices”, Büttner explains and adds: “The HZB offers high-tech facilities and expertise in all these areas, making it the perfect place for this ambitious project.

arö

  • Copy link

You might also be interested in

  • Disorder creates new properties in compound semiconductors
    Science Highlight
    29.06.2026
    Disorder creates new properties in compound semiconductors
    An international research team has demonstrated that the intrinsic disorder of the compound semiconductor CuInSnS₄ can be exploited to influence its optical properties. While the atomic vibrations also sense the local disorder, their response is averaged over many different local environments and therefore appear isotropic, as expected for a cubic crystal. In contrast, the optical excitations, known as excitons, are much more sensitive to the local arrangement of atoms. Surprisingly, they show a direction-dependent optical response even though the average crystal structure is cubic. These findings shed new light on the relationship between disorder and material properties, opening up new options for targeted 'disorder engineering' in optoelectronic and photocatalytic devices.
  • Superconducting TES array X-ray spectrometer goes into operation at BESSY II
    Science Highlight
    15.06.2026
    Superconducting TES array X-ray spectrometer goes into operation at BESSY II
    Europe's first and only TES-spectrometer at a synchrotron source is now in operation at BESSY II, developed within a collaboration between the HZB, the MPI-CEC (Mühlheim-an-der-Ruhr, Germany) and the NIST (Boulder CO, USA). The photon detection efficiency of the new instrument exceeds that of wavelength-dispersive X-ray emission spectrometers by a factor of 100 to 1000.  It will be used to investigate the electronic properties of atomically thin layers, nanostructures and highly diluted atomic and molecular samples. The team is looking forward to receiving exciting research proposals from the user community.
  • Magnon momentum microscopy: A new window into nanoscale spin-waves
    Science Highlight
    08.06.2026
    Magnon momentum microscopy: A new window into nanoscale spin-waves
    An international team lead by the Max Born Institute has developed a new type of momentum microscopy to image magnons — the quanta of collectively excited spins — directly in two-dimensional reciprocal space using soft X-rays. Measurements have taken place at BESSY II and PETRA III, first author ist the HZB physicist Steffen Wittrock. Owing to its remarkable sensitivity, simplicity, and access to nanometer-scale wavelengths, this novel technique establishes a powerful and versatile platform for exploring nonlinear magnon interactions, which are promising for future computing schemes.