Translational mode excitation of a nano-skyrmion lattice by radio-frequency scanning tunneling microscopy
Hung-Hsiang Yang1*, Marie Hervé2, Louise Desplat3, Volodymyr P. Kravchuk1, Timofey Balashov4, Philipp Markus1, Patrick Buhl5, Paul Antoine Hervieux3, Markus Garst1, Bertrand Dupé6,7
1Physical Institute, Karlsruhe Institute of Technology, Karlsruhe, Germany
2Institut des NanoSciences de Paris, Sorbonne University and CNRS-UMR7588, Paris, France
3Institute Physical And Chemistry Materials De Strasbourg, University of Strasbourg, Strasbourg, France
4II. Physikalisches Institut B, RWTH Aachen University, Aachen, Germany
5Institute of Physics, Johannes Gutenberg University Mainz, Mainz, Germany
6Fonds de la Recherche Scientifique, FNRS, Bruxelles, Belgium
7Nanomat/Q-mat/CESAM, University of Liège, Sart Tilman, Belgium
* Presenter:Hung-Hsiang Yang,
Recent developments of implementing radio-frequency voltage modulation into a scanning tunneling microscope have revealed great insights into the spin dynamics of single atoms. However, up to now most of the observed single-atom electron spin resonance relied on the modulated tip-subject displacements for generating ac magnetic fields. The accessible systems, thereby, are limited to single spins adsorbed on insulating thin films specifically on the MgO surfaces. Here, we demonstrated an alternative utilizing the spin-transfer torque for inducing effective ac magnetic fields and in turn expanding the experiments towards the ferromagnetic resonance regime on a skyrmion lattice.

Keywords: radio-frequency scanning tunneling microscopy, spin-polarized scanning tunneling microscopy, nano-skyrmion lattice