STM Image Gallery
Writing atomic-scale Initials Sample Rescue
Video: UHH/Arturo Rodríguez-Sota (ARS) Image: UHH/Jannik Laudel
Classic top view
STM image of Manganese trimers on an Iridium surface
A small asymmetry of the STM tip breaks their threefold symmetry and makes them appear as nanometric hearts.
Related Publication: A. Rodríguez-Sota et al., ACS nano. 18, 3699 (2024).
Image: UHH/A. Rodríguez-Sota
STM image of Manganese trimers on an Iridium surface
The scanning proccess moves some of the atoms that form the trimers in a preferred direction, creating the effect of some kind of atomic shooting stars.
Related Publication: A. Rodríguez-Sota et al., ACS nano. 18, 3699 (2024).
Image: UHH/A. Rodríguez-Sota
Nanostructures produced by heating H-Fe/Re(0001)
(weird & unpublished)
Image: UHH/Kubetzka
3D images
Domain wall loop and Skyrmion in Rh/Co/Ir(111)
Data published in: Sebastian Meyer et al., Nature Commun. 10, 3823 (2019)
Image: UHH/Kubetzka
Creating skyrmions and cutting domain walls with the current from an STM tip in PdFe/Ir(111)
Related publication: Niklas Romming et al., Science 341, 636 (2013)
Image: UHH/Kubetzka
Co atoms on a spin spiral, showing spin-depending electron density distributions
Related publication: David Serrate et al., Nature Nanotechnology 5, 350 (2010)
Image: UHH/Kubetzka
Composite images
Spin-friction STM image across a 2Q domain wall in fcc Mn/Re(0001)
Data published in: Jonas Spethmann et. al., Nature Commun. 12, 1 (2021)
Image: UHH/Kubetzka
Spin-friction STM image and Néel state in Fe/Re(0001)
Data published in: Safia Ouazi et al. Phys. Rev. Lett. 112, 076102 (2014).
Image: UHH/Kubetzka
Miscellaneous
Rescue needed
Here the single crystal (3x7 mm) was loose on the sample plate and the sample plate was about to fall out of the shuttle. With a steady hand, the crystal could be transferred to a load lock for rebinding.
Foto: UHH/von Bergmann
Movies
Writing atomic-scale Initials
Manganese exhibits very interesting growth phases when evaporated over iridium (111). One of these phases is formed by manganese clusters. The clusters are formed by three atoms (trimers) and can be dismembered via atom manipulation and rearranged differently. Using some of these Mn atoms, Arturo Rodríguez Sota was able to write his initials while trying to understand the clusters better. Related Publication: A. Rodríguez-Sota et al., ACS nano. 18, 3699 (2024).
Video: UHH/Arturo Rodríguez-Sota (ARS)
Continuous magnetic state transformation: 3Q -> 1Q -> 3Q -> 2Q -> ...
All Heisenberg exchange terms are constant on this path.
Related publication: Soumyajyoti Haldar et al. Phys. Rev. B 104, 18, L180404 (2021)
Video: UHH/Kubetzka
Concept of a Skyrmion Racetrack Memory
Skyrmions are particle-like magnetic "knots" in a ferromagnetic (green) medium. They can be written by voltage pulses at a metallic contact (yellow) through a tunnel barrier (transparent) and moved along the racetrack by an electrical current. In contrast to a magnetic hard drive, only the bits themselves move and the data storage density can be increased by folding the racetracks.
Related publication: Kirsten von Bergmann & André Kubetzka, Physics World 30, 25 (2017)
Video: UHH/Kubetzka | Music: "The Weekend" by chillmore from Pixabay
Construction of skyrmionic spin textures by superposition + normalization of 3 spin spirals
More states can be constructed by changing the phase and the position on the atomic lattice
Related publication: M. Gutzeit et al., Nature Commun. 13, 5764 (2022)
Video: UHH/Kubetzka
Domain wall animation
Video: UHH/Kubetzka