Browsing Fakultät für Physik (inkl. GAUSS) by Referee "Mathias, Stefan Prof. Dr."
Now showing items 1-12 of 12
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Coherent Control and Reconstruction of Free-Electron Quantum States in Ultrafast Electron Microscopy
(2018-01-04)The present (cumulative) thesis examines the quantum coherent interaction of ultrashort free-electron pulses with tailored optical near-fields. Multiple fields are utilised to prepare, coherently manipulate and characterise ... -
Combined Study of Local Spectroscopy and Macroscopic Electronic Transport of the Correlated Honeycomb Spin-Orbit Mott Insulator Na2IrO3
(2022-04-11)The search for novel phenomena that exceeds and interconnects our existing knowledge is at the heart of every scientific effort. Physics, and particularly solid-state research, is no exception. If anything, the ... -
Far-from-Equilibrium Quasiparticle Dynamics in Graphene
(2023-01-17)Comprehending far-from-equilibrium many-body interactions is one of the major goals of current ultrafast condensed matter physics research. Here, a particularly interesting but barely understood situation occurs during a ... -
Local excitation of confined molecule-surface hybrid systems
(2022-11-28)Molecule-surface hybrid systems promise solutions for a variety of technological challenges – including the development of efficient catalysts as well as of molecular electronic devices. In this work, different molecule ... -
Non-equilibrium structural Dynamics of incommensurate Charge-Density Waves
(2020-07-01)In recent years, charge-density wave (CDW) systems have been studied extensively, as they provide a diverse testing field for basic concepts in electron-phonon coupling, electron correlation, and structural phase transitions. ... -
Scanning Tunneling Spectroscopy of Rare Earth Hexaborides
(2020-12-22)Rare earth hexaborides are a well-suited model system for the exploration of correlation physics. The varying 4f occupation of the rare earth elements result in a richness of correlated electron phenomena, which harbor ... -
Thermalization in one-dimensional quantum-many-body systems
(2017-01-16)We consider the thermalization of the momentum distribution in two one-dimensional models. The first one is the integrable Hubbard model with an additional integrability breaking term in the Hamiltonian, which is a ... -
THz streaking at metal nanotips
(2018-03-20)This thesis addresses various aspects of terahertz (THz) streaking at metallic nanotips. In THz near-field streaking, electron pulses emitted by femtosecond near-infrared (NIR) pulses are accelerated in a THz-induced ... -
Ultrafast electron dynamics measured with a novel time-resolved high-repetition rate momentum microscopy setup
(2021-03-25)In this thesis, a new generation of a trARPES experiment has been successfully built up from scratch combining the advantages of a ToF momentum microscope with a lab-based HHG source, delivering femtosecond EUV pulses, ... -
Ultrafast Lorentz Microscopy using High-Coherence Electron Pulses
(2019-05-08)Information processing and storage applications demand increasing miniaturization and operation speeds, where optical manipulation of magnetic order may play a very important role. It is hence essential to study how light ... -
Ultrafast low-energy electron diffraction at surfaces
(2019-02-22)Due to their reduced dimensionality, surfaces and quasi two-dimensional materials exhibit numerous intriguing physical phenomena that drastically differ from the bulk. To resolve these effects and the associated dynamics ... -
Ultrafast Probing and Coherent Vibrational Control of a Surface Structural Phase Transition
(2021-08-26)The present thesis explores the coherent control of surface structural phase transitions by all-optical manipulation of key vibrational modes. To this end, ultrafast low-energy electron diffraction (ULEED) in combination ...