Calendar of Physics Talks Vienna

Elementary steps in surface dynamics and reactivity at electrochemical interfaces
Speaker:Olaf Magnussen (Kiel University, Institute of Experimental and Applied Physics Kiel/Germany)
Abstract:Processes at electrochemical interface are the key to many current and emerging technologies, e.g. in energy storage or micro- and nanofabrication. Using modern in situ and in operando techniques, detailed insights into these processes on the atomic scale can be obtained. In this talk, results by fast in situ scanning tunneling microscopy (Video-STM) and novel synchrotron X-ray scattering techniques are presented. The first method allows microscopic observations of atomic motion in real time, enabling studies of the mechanisms and dynamics of adsorbate diffusion and adsorbate-adsorbate interactions on electrode surfaces. As examples, measurements of the potential-dependent diffusion of isolated anionic, cationic, and organic adsorbates on noble metal electrodes will be described, which indicate a decisive role of coadsorbed anionic species. Specifically, these coadsorbates completely det
Date: Tue, 30.01.2018
Time: 16:00
Location:TU Wien, Institut für Angewandte Physik, E134 1040 Wien, Wiedner Hauptstraße 8-10 Yellow Tower „B“, 5th floor, SEM.R. DB gelb 05 B
Contact:Univ.Prof. Dr. Ulrike Diebold

Spontaneous symmetry breaking in theories with classical scale invariance
Speaker:Manuel Fink und Michael Lanschützer (Univ. Wien)
Abstract:im Rahmen des Seminars für Teilchenphysik
Date: Tue, 30.01.2018
Time: 16:15
Duration: 60 min
Location:Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock
Contact:H. Neufeld

The Hyperfine Puzzle of Strong-Field Bound-State QED
Speaker:Prof. Dr. Wilfried Nörtershäuser (Technische Universität Darmstadt)
Abstract:While quantum electrodynamics is usually referred to as the most accurately tested theory, its consistency for bound electrons in strong fields is still not proven with high accuracy. The strongest magnetic fields available in the laboratory are experienced by electrons bound in highly charged, heavy ions which can be probed by hyperfine transition spectroscopy. The transition in lithium-like Bismuth was directly observed for the first time in 2011 at the experimental storage ring ESR located at GSI Darmstadt, but the accuracy of the result was limited by the imprecise knowledge of the ion velocity and the corresponding Doppler shift. In a recent beamtime at the ESR, we were able to reduce the uncertainties ... the result was more than 7 sigma off... [for complete abstract visit: https://indico.smi.oeaw.ac.at/event/252/]
Date: Tue, 30.01.2018
Time: 17:00
Duration: 60 min
Location:Stefan-Meyer-Institut, Boltzmanngasse 3, 1090 Wien, Seminarraum 3-2-08 (2. Stock)
Contact:Prof. Dr. Eberhard Widmann, Dr. Martin Simon

Computational thermodynamics: how to calculate phase diagrams without the fuss (nested sampling)
Speaker:Dr Lívia Bartók - Pártay (Materials Chemistry Group, University of Reading , UK)
Abstract:In recent years we have been working on adapting a novel computational sampling technique, called ..... NESTED SAMPLING ..... , for studying atomistic systems. Nested sampling automatically generates all the relevant atomic configurations, unhindered by high barriers, and one of its most appealing advantages is that the global partition function can be calculated very easily, thus thermodynamic properties, such as the heat capacity or compressibility becomes accessible. Nested sampling samples the potential energy surface starting from the high energy region, hence no prior knowledge of the potentially stable structures is needed. This means that unlike other methods, nested sampling may be fully automated, allowing high-throughput calculations of novel materials. https://royalsociety.org/people/livia-bartok-partay-6401/
Date: Thu, 01.02.2018
Time: 14:00
Location:Seminarraum Physik , Sensengasse 8 , Erdgeschoss, 1090 Wien