Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 42 for “"electron dynamics"”.
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Electron dynamics in surface acoustic wave devices
… electric wave, and each dot carries a single electron at the SAW velocity (∼ 2800 m/s). These devices may be of use in developing future quantum information processors, and also offer an ideal environment for probing the quantum mechanical behaviour of single electrons. This thesis describes a …
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Momentum-resolved electron dynamics in a strange metal
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-20 without embargo terms
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Ab initio modelling of photoinduced electron dynamics in nanostructures
… obtained energy absorption rates and population dynamics are compared with results from existing analytical approaches. Good agreement between the two methods is shown, while the PEOM proves to be an improvement when investigating ultrafast excitations in such systems. The method is then further …
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Nonequilibrium electron dynamics under energetic ions or electrons irradiation
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-08-01
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Curiosities of the Electron Dynamics of Spin-Crossover Solids (Moessbauer)
… of the Mossbauer technique. However the electron dynamics of FeP complexes are found to be highly sensitive to the nature of their solid state environs, depending on the degree of crystallinity or "defect character" as well as the presence of solvating CH(,2)Cl(,2) molecules or …
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Correlated electron dynamics and memory in time-dependent density functional theory
Korrelierte Elektronendynamik ist für nichtlineare und lineare Prozesse in Atomen und Molekülen von großer Bedeutung. Dies betrifft insbesondere die Wechselwirkung mit starken Feldern und die Photoabsorptionsspektren. Die theoretische Beschreibung der Korrelationen gestaltet sich jedoch im …
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Ultrafast electron dynamics in Fe(CO)5 and Cr(CO)6
… Cr(CO)₆ are investigated with time-resolved photoelectron spectroscopy at a high harmonic setup. In both of these metal carbonyls, a UV photon can induce the dissociation of one or more ligands of the complex. The mechanism of the dissociation has been debated over the last decades. The electronic …
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Simulations of laser-induced correlated many-electron dynamics in molecular systems
In this thesis, simulations of laser-driven many-electron dynamics in molecules are presented, i.e., the interaction between molecules and an electromagnetic field is demonstrated. When a laser field is applied to a molecular system, a population of higher electronic states takes place as well as …
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Theoretical studies of electron dynamics and relaxation in photoexcited quantum well structures
… play an essential role in the field of optoelectronics. This thesis focuses on the quantum mechanical aspects of electron dynamics and relaxation (or capture) in QW structures with particular attention paid to understanding and interpreting the results from the various optical experiments …
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Femtosecond Time-Resolved Laser Spectroscopic Studies on the Electron Dynamics in Heterostructured Nanomaterials
… been focused on the photoinduced charge carrier dynamics in heterostructured nanomaterials. Of particular interest are type-II heterostructures, where the relative band alignment of their constituent semiconductor materials promotes a spatial separation of the electron and hole following …
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Lightwave Electronics Based on Nanoantenna Networks
… atoms and molecules responsible for atomic-scale electron dynamics. Through the realm of ultrafast nonlinear optics, the manipulation of optical waveforms has paved the way for controlling electrons at optical frequencies [1]–[7]. This breakthrough has led to a deeper understanding of electron …
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Angle-Resolved Photoemission Studies on the Many-Body Effects of High-Temperature Superconductor: Bi-2212
… These results reflect the underlying correlated electron dynamics in Bi-2212 and support the picture of spin fluctuations as a key mediator of high temperature superconductors.
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High harmonic generation by short laser pulses: time-frequency behavior and applications to attophysics
… seconds) could induce and probe the dynamics of electrons in atoms and solids. In the last part of my thesis, I will examine some examples of attosecond electron dynamics.
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Electron equations of state during magnetic reconnection
… properties, it depends on small-scale local electron dynamics. Particularly in collisionless plasmas, velocity-space anisotropy of the electrons plays a leading role in governing the energy exchanges and shaping the currents that develop during reconnection. The anisotropy results from an …
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Damages in Transparent Materials by Ultrashort Laser Pulse
… We also numerically model pulse propagation and electron dynamics in borosilicate glass and fused silica in both picosecond and femtosecond regimes. The shape and size of the damage sites are shown to correspond to an electron cloud with density of about 10^20 cm^-3. The underlying mechanism of …
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NONLINEAR AND ULTRAFAST OPTICAL STUDIES OF INTERFACIAL PROCESSES IN PHOTOVOLTAIC NANOMATERIALS
… conversion efficiency, the mechanism of the electron dynamics driving these systems remains controversial. This stems in part from the fact that the experimentally deduced time constants, which are characteristic of such systems, are only ever extracted from phenomenological models and …
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Attosecond Wave Packet Metrology
Attosecond pulses allow the study of electrons on their natural timescale. They are created from the interaction of atoms with ultrashort, intense laser pulses whose electric field approaches the strength of inner-atomic electric fields. This thesis presents experiments around the generation, …
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Transient extreme ultraviolet spectroscopy of semiconductors
… theory (DFT). Excitation in the visible promotes electrons from the valence bands to the conduction bands, resulting in photogenerated charge carriers (holes and electrons). The XUV valence band region shows new transitions from the core states into the unoccupied holes, providing a tool for …
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Ultrafast Atomic Dynamics in Arbitrary Light Fields
… theoretical techniques for simulating multielectron atoms and atomic ions in light fields of arbitrary complexity.<br/><br/>An ab initio R-matrix with time-dependence (RMT) theory for ultrafast atomic processes in arbitrarily polarised laser fields is described. The theory is applicable to …
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Development of the DRACO ES-PIC code and Fully-Kinetic Simulation of Ion Beam Neutralization
… process was divided into three steps. Electron dynamics was studied by assuming an initial beam neutralization, which was accomplished by injecting both electrons and ions from the optics. Performing the simulation on a full-sized domain with cell size much greater than the Debye length …
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