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 Karl Franzens University Graz

Graz University of Technology 

TUG/KFU Physics Colloquium Summer 2021


Tuesday 02 March 2021      KFU - Online (Zoom)

16:15 - 17:15

Physics and Applications of Epsilon-Near-Zero Materials
Robert W. Boyd, University of Ottawa

In this talk, we describe some of the properties of light propagation through a material for which the dielectric permittivity, and hence the refractive index, is nearly vanishing. Among other unusual optical properties, we find that such epsilon-near-zero (ENZ) materials display ... more


Tuesday 09 March 2021      TUG online

16:15 - 17:15

2D and 3D SEM-based electron diffraction techniques as central tools for correlative microscopy to obtain new insights into microstructure physics and chemistry
Stefan Zaefferer, Max Planck Institute for Iron Research Duesseldorf

The scanning electron microscope (SEM) offers two electron diffraction techniques that allow to obtain comprehensive and quantitative information about the crystalline microstructure of materials, namely electron backscatter diffraction (EBSD) with all its facets and variations, ... more


Tuesday 23 March 2021      TUG - Online

16:15 - 17:15

Amon based Quantum Machine Learning
Anatole von Lilienfeld, University Vienna

Many of the most relevant observables of matter depend explicitly on atomistic and electronic details, rendering a first principles approach to computational materials design mandatory. Alas, even when using high-performance computers, brute force high-throughput screening of mat ... more


Tuesday 20 April 2021      Graz University of Technology, remote - online

16:15 - 17:15

Nanoporous materials for hydrogen isotope separation
Dr. Michael Hirscher, Max-Planck-Institut für Intelligente Systeme (ehemals Max-Planck-Institut für Metallforschung), Stuttgart

One of the important operations in chemical industry is separation and purification of gaseous products. Especially H$_2$/D$_2$ isotope separation is a difficult task since its size, shape and thermodynamic properties resemble each other. Porous materials offer two different mech ... more


Tuesday 27 April 2021      KFU HS 5.01

16:15 - 17:15

Quantum magnonics - Quantum optics with magnons
Silvia Viola-Kusminskiy, Max Planck Institute for the Science of Light

In the last five years, a new field has emerged at the intersection between Condensed Matter and Quantum Optics, denominated “Quantum Magnonics”. This field strives to control the elementary excitation of magnetic materials, denominated magnons, to the level of the single quanta, ... more


Tuesday 04 May 2021      Graz University of Technology, remote - online

16:15 - 17:15

Laser Picoscopy: Seeing valence electrons in solids with sub-Angstrom resolution
Prof. Dr. Eleftherios Goulielmakis, University of Rostock

The wavelength of visible light is often assumed to impose a fundamental frontier in optical microscopy. Indeed, the Abbe limit constrains the resolution of optical techniques to tens or hundreds of nanometers and makes visible light inadequate for electron-level imaging of the m ... more


Tuesday 11 May 2021      KFU - Online

16:15 - 17:15

Momentum-Space Movies of Electrons at Interfaces and in 2D Semiconductors
Ulrich Höfer, University Marburg

Time-resolved photoemission combines femtosecond pump-probe techniques with angle-resolved photoelectron spectroscopy (ARPES). New opportunities for this powerful technique arise in combination with THz excitation on one hand and ultrashort XUV probe pulses on the other hand. I w ... more


Tuesday 18 May 2021      Graz University of Technology - remote online

16:15 - 17:15

Developments in High Speed Structural Imaging of Low Dimensional Materials
Prof. Angus Kirkland, University of Oxford

I will describe recent work using high speed direct electron detectors and artificial intelligence / machine learning to automatically map defect transitions in graphene. I will also discuss the use of similar detectors in electron ptychography, in particular under extremely low ... more


Tuesday 08 June 2021      TUG - Online

16:15 - 17:15

Polymer Films, Structures, and Devices by Initiated and Oxidative Chemical Vapor Deposition
Kenneth K. S. Lau, Department of Chemical and Biological Engineering, Drexel University

Chemical vapor deposition (CVD) is a non-conventional route for constructing polymers as thin films, non-planar structures, and integrated devices. Polymer thin films are conventionally formed through liquid phase processing, like dip coating, spray coating and spin casting. Like ... more


Tuesday 15 June 2021      KFU - Online

16:15 - 17:15

Embedded many-body perturbation theory for the electronic properties of organic systems
Xavier Blase, Institut Néel, CNRS, Grenoble, France

Many-body perturbation theories, such as the GW and Bethe-Salpeter formalisms, have become a tool of choice in solid-state physics for studying the optoelectronic properties of crystals. Difficulties arise when attempting to explore with such techniques extended disordered system ... more


Tuesday 22 June 2021      TUG - Online

16:15 - 17:15

Focused Electron/Ion Beam Induced deposition for the growth of metallic, magnetic and superconducting nanostructures
José María De Teresa , Universidad de Zaragoza, Spain

Today, nanolithography is a key enabling technology in various research and application fields. Focused Electron/Ion Beam Induced Deposition (FEBID/FIBID) nanolithography techniques stand out for the growth of functional nanomaterials with high-resolution, and their use is widesp ... more
Video: Passwort: U4qDmmNQu54


Tuesday 29 June 2021      KFU - Online (Zoom; link in the abstract)

16:15 - 17:15

Particle acceleration on a nanophotonic chip - and other ways of controlling electrons with ultrafast laser fields
Peter Hommelhoff , Friedrich-Alexander-University Erlangen

It is well known for decades that light can impart momentum to charged particles in the vicinity of a third body. With nanostructured dielectric materials and ultrafast laser pulses, this momentum transfer can become highly efficient, demonstrated in 2013 in two proof-of-concept ... more