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Advertising division: PGI-3 - Functional Nanostructures at Surfaces
Reference number: D068/2018, Physics or a related discipline

PhD position: Photoemission tomography of the low-dimensional organic adsorbates

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: 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 advanced synchrotron-based methods of photoemission spectroscopy provide a direct access to electronic properties in these complex materials. 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, while the x-ray standing wave (XSW) technique [J. Sforzini et al., Phys. Rev. Letters 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 these methods will be applied to study interactions at the molecule/graphene and molecule/hBN interfaces.

Job description
We are searching for motivated candidates for BSc, MSc and PhD research projects in the framework of the D-A-CH Lead Agency Procedure program. The photoemission tomography and XSW experiments will be carried out at the Metrology Light Source beam line of the Physikalisch-Technische Bundesanstalt (Berlin) and the Diamond Light Source (UK). Complementary scanning tunneling microscopy and photoemission spectroscopy experiments will be performed in home laboratories of the Peter Grünberg Institut (PGI3).
The project will be carried out in a close collaboration with experimental and theoretical research groups at University of Graz, Heidelberg University and Bonn University.

Requirements
For the PhD research project, the MSc or equivalent degree (e.g. "Diplom") in physics or chemistry with an overall grade of at least "good" is required. 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.

About us
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.

More Information and Application
We are looking forward to your application. Please send all relevant documents (CV, certificates, the university record transcript etc) to the address below. 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

e-mail: s.subach@fz-juelich.de
web: www.fz-juelich.de/pgi/pgi-3