Manipulating the electronic properties of atomically thin transition metal chalcogenides.

PhD defence, Tuesday 20 February 2018. Fabian Arnold

2018.02.20 | Karen Konradi

Fabian Arnold

Two-dimensional (2D) materials are by definition substances that solely consist of a few layers of atoms. Due to confinement in two-dimensions, electrons can move freely along the plane of the interface but, the motion is restricted in the third dimension. This simple example already demonstrates that thinning down a macroscopic bulk crystal in one-dimension may modify the electronic structure of the material and that dimensionality is in general a defining parameter for a material’s properties. More specifically, the restriction of dimensionality can even influence the resistance-free flow of electrical charges, i.e. superconductivity, or the magnetic state of the 2D material.


In his Ph.D. studies, Fabian Arnold has synthesized  high quality 2D materials in particular, the superconducting thin film iron chalcogenides FeSe on Bi2Se3  and FeTe on Bi2Te3 and  for the first time ever the predicted 2D magnet single layer V1+xS2  on Au(111). The properties of these novel 2D transition metal chalcogenides combined with the ability to synthesize them in atomically thin layers make them especially interesting for high-performance functional nanomaterials and data storage systems, and therefore to a key element for the ­­­

The PhD degree was completed at the Department of Physics and Astronomy, Aarhus University.

This résumé was prepared by the PhD student.

Time: Tuesday 20 February 2018 at 14.15
Place: Building 1525, room 626. Department of Physics and Astronomy, Ny Munkegade 120, Aarhus University, 8000 Aarhus C
Title of dissertation: Synthesis, Structure and Electronic Properties of Novel Single Layer Transition Metal Chalcogenides
Contact information: Fabian Arnold, e-mail: tel.: +45 50 19 39 63

Members of the assessment committee:
Professor Carsten Busse, Department of Faculty of Physics, University of Siegen, Germany.
Professor Isabella Gierz, Department of Max Planck Institute for the structure and dynamics of Matter, Germany.
Lektor Karsten Riisager, Department of Physics and Astronomy, Aarhus, Denmark.

Main supervisor:
Professor Philip Hofmann, Department of Physics and Astronomy Aarhus University
The PhD dissertation will be defended in English

The defence is public.
The dissertation is available for reading at the Graduate School of Science and Technology/GSST, Ny Munkegade 120, building 1520, rooms 128-134, 8000 Aarhus C.

PhD defence
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Revised 19.02.2018