Peter Grünberg Institute (PGI)

Quantum Nanoscience (PGI-3)

Electron Spectroscopy

The banner image shows a section of the phonon dispersion of graphite measured with the MCES150 that was developed in our institute and is commercially available from ScientaOmicron.

About

We develop high-intensity and high-resolution electron sources to study collective charge modes in model materials that are relevant for topological quantum computing. We also establish new approaches for the epitaxial growth of 2D materials.

Research Topics

Monochromatised electron source
Graphene
Chemically-resolved vertical structures with sub-Angstrom resolution

Contact

Dr. Francois Posseik

PGI-3

Building 02.4w / Room 135

+49 2461/61-5950

E-Mail

Members

Monja StettnerPhD student at Peter Grünberg Institute (PGI-3) Building 02.4w / Room 128+49 2461/61-6313

Research

Monochromatised Electron Sources

Monochromatized Electron Sources for two kind of applications have been developed in our institute: High-resolution electron energy loss spectroscopy (HREELS) and inverse photoemission spectroscopy (IPES).

Graphene

We develop new approaches to obtain high-quality graphene, grown epitaxially on silicon carbide, a wide band gap semiconductor. In particular, we try to realise wafer-size samples with unconventional twist angles.

Chemically-Resolved Vertical Structures with sub-Angstrom Resolution

We employ and develop the normal incidence x-ray standing wave technique (NIXSW) to study interfaces between molecular layers and their substrates, and also (internal) interfaces of two-dimensional materials.

Recent Publications

Y. Nakayama, F. C. Bocquet, R. Tsuruta, S. Soubatch, F. S. Tautz, "Anisotropic dispersion of excitonic bands of the single-crystal pentacene (001) surface as measured by low-energy angle-resolved high-resolution electron energy-loss spectroscopy", Journal of Electron Spectroscopy and Related Phenomena 279, 147514 (2025). https://doi.org/10.1016/j.elspec.2025.147514

S. Wolff, M. Hutter, P. Schädlich, H. Yin, M. Stettner, S. Wenzel, F. S. Tautz, F. C. Bocquet, T. Seyller, and C. Kumpf, “Bi-intercalated epitaxial graphene on SiC(0001)”, New Journal of Physics 26, 103009 (2024). https://doi.org/10.1088/1367-2630/ad7f7d

H. Ibach, H. Sato, M. Kubo, F. S. Tautz, H. Yoshida, and F. C. Bocquet, “A novel high-current, high-resolution, low-kinetic-energy electron source for inverse photoemission spectroscopy”, Rev. Sci. Instrum. 94, 043908 (2023). https://doi.org/10.1063/5.0138512

Last Modified: 01.08.2025

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