Calendar of Physics Talks Vienna

Probing Chemistry at the Ångström-Scale via Scanning Tunneling Microscopy Combined Tip-Enhanced Raman Spectroscopy
Speaker:Nan Jiang (Department of Chemistry, University of Illinois Chicago, USA)
Abstract:My research group is interested in investigating how local chemical environments affect nanostructure properties with Ångström scale resolution. This talk will start with Tip-Enhanced Raman Spectroscopy (TERS), which affords the spatial resolution of traditional Scanning Tunneling Microscopy (STM) while collecting the chemical information provided by Raman spectroscopy. By using a plasmonically active material for our scanning probe, the Raman signal at the tip-sample junction is incredibly enhanced, allowing for single-molecule probing. This method, further aided by the benefits of ultrahigh vacuum, is uniquely capable of controlling localized plasmons via an atomistic approach. We are able to obtain (1) single-molecule chemical identification; (2) structural identification of new synthetic 2D materials; (3) atomic-scale insights into the oxygen reactivity of 2D materials; (4) local str
Date: Tue, 26.03.2024
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:Prof. Gareth Parkinson

Towards hybrid quantum magnonics
Speaker:Carlos Gonzalez Ballestero (TU, the institute of theoretical physics )
Abstract:Ferromagnetic spin waves or magnons, namely magnetization waves in ferromagnets, have become popular candidates for new classical information technology due to their unconventional set of properties, such as tunable dispersion and strong nonlinearities. In the last years many researchers are attempting to bring these excitations to the quantum regime hoping they can be an asset for hybrid quantum platforms. However, many questions at the fundamental level remain unanswered, such as whether spin waves can indeed be an asset in hybrid devices or how to control them at the quantum level. I will introduce our team’s research on the path to answer these and other questions. First, I will show how spin waves can be harnessed in nanomechanics to internally refrigerate resonators by mediating the coupling between motional and acoustic degrees of freedom. I will also show how coupling spin waves
Date: Wed, 27.03.2024
Time: 16:15
Duration: 45 min
Location:Helmut Rauch Hörsaal ATI
Contact:Maximilian Prüfer