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We welcome Dávid Szaller

Dávid defended his PhD at the Budapest University of Technology and Economics, Hungary in 2017. In his thesis he studied the low energy optical properties of magnetoelectric multiferroic crystals. One of the most fascinating effect these materials present is directional dichroism, i.e. different absorption of counter-propagating light beams, which David has observed in several multiferroics in the THz frequency regime. Besides the optical experiments, in order to gain a deeper insight into this phenomenon he also carried out group-theoretical and statistical-physical analyses. David joins our group as a PostDoc, continuing his research on the low frequency excitations of multiferroics.

Measured for the first time: direction of light waves changed by quantum effect

The 'quantized magneto-electric effect' has been demonstrated for the first time in topological insulators at TU Wien, which is set to open up new and highly accurate methods of measurement.

A light wave sent through empty space always oscillates in the same direction. However, certain materials can be used to rotate the direction in which the light is oscillating when placed in a magnetic field. This is known as a 'magneto-optical' effect.

After much speculation spanning a long period of time, one variant of this type of effect has now been demonstrated at TU Wien for the first time. Rather than switching the direction of the light wave continually, special materials called 'topological insulators' do so in quantum steps in clearly defined portions. The extent of these quantum steps depends solely on fundamental physical parameters, such as the fine-structure constant. It may soon be possible to measure this constant even more accurately using optical techniques than is currently possible via other methods. The latest findings have now been revealed in the open-access journal 'Nature Communications'.

(read more) (article) Pimenov Team

We welcome Lorenz Bergen

Lorenz studied Physics at TU Wien from 2010 to 2016, completed with a Diploma thesis performed in the group of Prof. Aumayr. There he investigated the nanostructuring of surfaces by swift heavy ion impacts. After working at the Helmholtz-Zentrum Dresden-Rossendorf, Lorenz came back to Vienna in 2017 and joined the group as a PhD-Student.

We welcome Evan Constable

Evan is an Australian researcher with a background in terahertz spectroscopy. In 2014, he completed his PhD at the University of Wollongong, Australia where he focused on spectroscopy of magnetic materials. During his studies, he developed a keen interest into the complementary nature of terahertz and neutron spectroscopic techniques. This interest brought him to Grenoble, France, where he undertook a postdoc position with the CNRS at Institut Néel from 2015 to 2017. Working closely with researchers at the SOLEIL synchrotron and ILL reactor, Evan continued to develop projects that brought together complementary terahertz and neutron scattering experiments on frustrated magnetic systems. Evan now joins the solid-state spectroscopy group as a postdoctoral researcher. His primary research interests remain in the fields of terahertz spectroscopy, frustrated magnetism and multiferroics.

We welcome Jan Gospodarič

Jan joined the group in the beginning of 2017 as a doctoral candidate. He previously studied physics at University of Ljubljana, Slovenia from 2010 to 2016, a study he ended with a successful Master's thesis project at the Jožef Stefan Institute in a research group of prof. Dragan Mihailović. His thesis examined the optical spectroscopy of a hidden state in 1T-TaS2 in visible regime.

We welcome Lukas Weymann

Lukas studied from 2011 to 2016 physics at the Leibniz University in Hannover. He wrote his master thesis at the Max Planck Institute for Gravitational Physics (Albert Einstein Institute) in the independent research group of Dr. Holger Pletsch. His thesis was based on the gamma-ray timing of an extreme black widow binary pulsar.

New PostDoc position

There is a new PostDoc position available in the area of optical and infrared spectroscopy.

Successful PhD Thesis Defense

Congratulations to our group member and friend Markus Schiebl for successfully defending his PhD thesis, "Dielectric spectroscopy at the spin-driven ferroelectric phase transition in chiral multiferroic DyMnO3", supervised by Prof. Dr. A. Pimenov.

PhD defense of Markus Schiebl

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