Kamil Bobowski
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Kamil Bobowski has a total of 15 co-authors. Here are the top co-authors by number of shared publications:
- Andreas Scherz
European XFEL
1 shared publication - Beatrice Andres
Freie Universität Berlin, Fachbereich Physik, Arnimallee 14, 14195 Berlin, Germany
1 shared publication - Björn Frietsch
Freie Universität Berlin, Fachbereich Physik, Arnimallee 14, 14195 Berlin, Germany
1 shared publication - Cephise Cacho
Diamond Light Source Ltd, Harwell Science and Innovation Campus, Didcot, UK
1 shared publication - Christian Strüber
Freie Universität Berlin, Fachbereich Physik, Arnimallee 14, 14195 Berlin, Germany
1 shared publication - Cornelius Gahl
Department of Physics, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
1 shared publication
Latest Publications
- Open Access
- 19 July 2024
- Published by American Association for the Advancement of Science (AAAS) in Science Advances
- Vol. 10 (29) , eadn4613
Ultrafast spin transfer and its impact on the electronic structure
Optically induced intersite spin transfer (OISTR) promises manipulation of spin systems within the ultimate time limit of laser excitation. Following its prediction, signatures of ultrafast spin transfer between oppositely aligned spin sublattices have been observed in magnetic alloys and multilayers. However, it is known neither from theory nor from experiment whether the band structure immediately follows the ultrafast change in spin polarization or whether the exchange split bands remain rigid. We show that ultrafast spin transfer occurs even in ferromagnetic gadolinium metal. Charge transfer between localized surface and extended valence-band states leads to a decrease of the surface spin polarization. This synchronously alters the exchange splitting of the bulk valence bands during laser excitation. Moreover, the onset of demagnetization can be tuned by over 200 fs by changing the temperature-dependent spin mixing. Our results show a promising route to ultrafast control of the magnetization, widening the impact and applicability of OISTR.
- 19 July 2024
- Published by American Association for the Advancement of Science (AAAS) in Science Advances
- Vol. 10 (29) , eadn4613
Open AccessUltrafast spin transfer and its impact on the electronic structure
Optically induced intersite spin transfer (OISTR) promises manipulation of spin systems within the ultimate time limit of laser excitation. Following its prediction, signatures of ultrafast spin transfer between oppositely aligned spin sublattices have been observed in magnetic alloys and multilayers. However, it is known neither from theory nor from experiment whether the band structure immediately follows the ultrafast change in spin polarization or whether the exchange split bands remain rigid. We show that ultrafast spin transfer occurs even in ferromagnetic gadolinium metal. Charge transfer between localized surface and extended valence-band states leads to a decrease of the surface spin polarization. This synchronously alters the exchange splitting of the bulk valence bands during laser excitation. Moreover, the onset of demagnetization can be tuned by over 200 fs by changing the temperature-dependent spin mixing. Our results show a promising route to ultrafast control of the magnetization, widening the impact and applicability of OISTR.