PhD position: Organic semiconductors on extended 2D materials
Field of research
Extended two-dimensional materials, like graphene (Gr) or hexagonal boron nitride (hBN) attract particular attention due to their potential applications in future information and energy production/storage technologies. Two major aspects are in the focus of fundamental research currently: combination of different types of extended 2D materials aiming at achieving novel 3D structured van der Waals solids, and controllable manipulation of their properties, for example through functionalization by additional chemically and electronically active agents – organic molecules. Understanding of interactions in such compound materials is a key for predicting their functional potentials. To this end, the methods of scanning tunneling microscopy and spectroscopy (STM/STS) deliver structural and electronic information on a local (single molecule) level, whilst the advanced synchrotron-based methods of photoemission spectroscopy provide a direct access to the data on macroscopic range. Particularly, the tomographic angular resolved photoemission spectroscopy [S. Weiß et al., Nat. Comm. 6, 8287 (2015)] allows to directly approach and differentiate the valence bands of organic and 2D materials in the reciprocal space, while X-ray standing wave (XSW) technique [J. Sforzini et al., PRL 114, 106804 (2015)] delivers precise information on the distances between 2D materials and adsorbed organic molecules on a sub-Å scale. In the proposed research project all these methods will be applied to study interactions at the molecule/graphene and molecule/hBN interfaces.
We are searching for a motivated PhD candidate interested in the offered research project. STM and photoemission experiments will be performed in the labs of the PGI-3/FZJ institute as well as at the experimental end-stations of the synchrotron beam lines. For instance, tomographic ARPES experiments will be carried out at the Helmholtz-Zentrum Berlin (BESSY II) and the Elettra Sincrotrone Trieste (Italy), the XSW experiments – at the Diamond Light Source (UK). The project will be carried out in a close collaboration with experimental and theoretical research groups at University Graz, FU Berlin, FHI Berlin, Uni Bonn, TU München and others.
The Forschungszentrum Jülich is the largest German research centre and offers excellent opportunities for research in an international environment. It is closely linked to the RWTH Aachen within the Jülich-Aachen Research Alliance (JARA). Salaries are competitive (TvöD + allowance depending on the candidate's profile and experience) and dissertations are usually completed within three years. Equal opportunities are a cornerstone of our staff policy for which we have received the "TOTAL E-QUALITY" award. Therefore applications from women are particularly welcome. Applications from disabled persons are also welcome.
MSc or equivalent degree (e.g. "Diplom") in physics or a related discipline with an overall grade of at least "good". The candidate should be highly motivated, fluent in German or English, have good interpersonal communication skills, and be interested in working in an interdisciplinary and international team of scientists.
More Information and Application
We are looking forward to your application. Please send all relevant documents to the address below (preferably via e-mail). For any further information, please do not hesitate to contact us.
Dr. Sergey Subach / Prof. Dr. Stefan Tautz
Peter Grünberg Institut (PGI3)
Forschungszentrum Jülich GmbH
52425 Jülich, Germany