Fakultät für Physik (inkl. GAUSS)
Recent Submissions
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Development of in-situ transmission electron microscopy techniques for electrochemistry
(2025-02-18)In this doctoral thesis, two newly developed in-situ transmission electron microscopy (TEM) methods are introduced, and their applications are demonstrated. The first one allows the insitu characterization and analysis ... -
Superstructures and heat transport in large-scale convection systems in large-scale convection systems
(2025-02-17)This thesis conducts a comprehensive investigation of Rayleigh-Bénard convection experimental and numerically in a rectangular cell, characterized by an aspect ratio of 5, exploring a wide range of Rayleigh numbers ($\Ra$) ... -
Sensory processing and learning in spiking neural networks
(2025-02-12)Organisms are capable of navigating an extremely complex environment with the help of their senses. To do this, they exploit that high dimensional sensory inputs can often be predicted from relatively sparse information, ... -
MINFLUX nanoscopy deep in (living) brain tissue
(2025-02-06)Optical fluorescence microscopy offers intrinsic advantages that enable imaging in tissue, such as non-invasiveness and specificity of the fluorescence signal. However, the resolution and thus the information content ... -
Development of the detector readout for the ATLAS Phase II ITk pixel detector
(2025-01-23)During the HL-LHC upgrade, a high luminosity upgrade takes place, where the instantaneous luminosity will reach 7.5 × 10^(34) cm^(−2)s^(−1) in Run 4. The current inner detector of the ATLAS experiment will be replaced by ... -
Stochastic dynamics of driven Brownian particles in viscoelastic solvents
(2025-01-13)Since its seminal discovery by the botanist Robert Brown, Brownian motion has become an important paradigm in statistical physics. It describes the incessant, random motion of small (Brownian) particles suspended in a ... -
Coherent attosecond electron microscopy
(2024-12-20)This work contributes to the development of time-resolved electron microscopy techniques for imaging optical excitations. Two articles, reprinted in this cumulative thesis, present novel measurement schemes that image the ... -
Measurement of the tt̄γ production cross section with the ATLAS experiment at √ s = 13 TeV using the full Run 2 data set
(2024-12-19)With Run 1 of the LHC, an unequalled top-quark factory started its operation. While during Run 1 the focus was on tt̄ measurements, the unprecedented size of the ATLAS Run 2 data set of 140 fb −1 allows for precise ... -
Grenzflächen- und Verspannungseffekte in La₁₋ₓSrₓMnO₃-Dünnschichten
(2024-12-19)In this dissertation, strain and interface effects on La₁₋ₓSrₓMnO₃ (LSMO) thin films with doping levels 0 ≤ x ≤ 0.6 are investigated by Raman spectroscopy and surface-enhanced Raman spectroscopy (SERS). For undoped LaMnO₃, ... -
Towards a new view of the photospheric magnetic field with the Polarimetric and Helioseismic Imager on Solar Orbiter
(2024-12-19)Accurately determining the magnetic flux through the solar surface is incredibly important to understanding the dynamics of the Sun and its atmosphere. The magnetic field provides energy for heating the higher layers of ... -
Stochastic (thermo)dynamics of molecular coupled processes
(2024-12-18)Out of equilibrium biological processes are the key for life. From large animals to the smallest proteins, life is sustained by a continuous throughput of free energy. This happens through the exchange of some form of ... -
Modeling spectral and total solar irradiance variability from any vantage point in the Solar System
(2024-12-17)The Sun is the primary external energy source for all planets in the Solar System. Its radiative flux, known as solar irradiance, plays a crucial role in planetary atmosphere modeling. Accurate spectral solar irradiance ... -
Turbulence in convective boundary layers: a statistical investigation
(2024-12-12)A combination of vertical turbulent convection and shear-driven turbulence governs the convective boundary layers (CBLs), and the role of turbulence in CBL dynamics has yet to be fully understood. In this thesis, we aim ... -
Processes of structure formation in copolymer systems
(2024-11-15)Block copolymers exhibit complex properties, such as self-assembly capabilities and viscoelasticity, making them indispensable in various industries and scientific fields. Their ability to create ordered microscopic ... -
Bringing Order to the Framework: Nanoscale Charge Transport Characterization of MOFs and COFs
(2024-10-22)Reticular chemistry, the synthesis of highly ordered, porous, crystalline networks with a previously identified target structure, has given rise to various classes of open framework materials, including the best-known ... -
Structure and Kinematics of the Broad-Line Region in Selected Changing-Look AGN
(2024-10-18)In this thesis, the results of three variability studies conducted on three individual active galactic nuclei (AGN) are presented. Each of these AGN belongs to the class of changing-look (CL) AGN, which are characterized ... -
Inferring atomic line parameters from solar spectra
(2024-09-19)The proximity of the Earth to the Sun offers a unique opportunity to study different plasma phenomena that occur in its atmosphere, which are unattainable in plasma laboratories. Advances in the instruments used for solar ... -
Iterative helioseismic holography
(2024-08-28)The understanding of the solar interior, in particular the subsurface solar flows, is im- portant for understanding the solar activity cycle. Traditional local helioseismology does not use all the seismic information ... -
Investigation of boundary layer transition at high Reynolds numbers using time-resolved temperature-sensitive paint
(2024-08-23)Understanding the fundamental principles of the processes that lead to laminar-turbulent transition on aerodynamic surfaces is of significant importance to correctly describe, model and perhaps ultimately influence the ... -
Radio-frequency controlled low-energy electron pulses
(2024-08-23)Electron beams are invaluable for probing material structures and dynamic processes due to their large scattering cross sections and the versatility of tunable electron optics for diffraction and microscopy. Pulsed electron ...