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AbstractAbstract
[en] The present thesis is dedicated to the experimental study of the metal-semiconductor phase transition of samarium sulfide (SmS): Temperature- and time-resolved experiments on the characterization of the phase transition of mixed-valence SmS samples (M-SmS) are presented. The measurement of the dynamics of the laser-induced phase transition pursues via time-resolved ultrashort-time microscopy and by X-ray diffraction with sub-picosecond time resolution. The electronic and structural processes, which follow an excitation of M-SmS with infrared femtosecond laser pulses, are physically interpreted on the base of the results obtained in this thesis and model imaginations.
[de]
Die vorliegende Arbeit ist der experimentellen Untersuchung des Metall-Halbleiter-Phasenuebergangs von Samariumsulfid (SmS) gewidmet. Es werden temperatur- und zeitaufgeloeste Experimente zur Charakterisierung des Phasenuebergangs gemischt-valenter SmS Proben (M-SmS) vorgestellt. Die Messung der Dynamik des laserinduzierten Phasenuebergangs erfolgt ueber zeitaufgeloeste Ultrakurzzeit-Mikroskopie und durch Roentgenbeugung mit subpikosekunden Zeitaufloesung. Die elektronischen und strukturellen Prozesse, welche einer Anregung von M-SmS mit infraroten Femtosekunden-Laserpulsen folgen, werden auf der Basis der in dieser Arbeit gewonnenen Ergebnisse und Modellvorstellungen physikalisch interpretiert. (orig.)Original Title
Die Dynamik des laserinduzierten Metall-Halbleiter-Phasenuebergangs von Samariumsulfid (SmS)
Primary Subject
Source
15 Dec 2009; 104 p; Diss. (Dr.rer.nat.)
Record Type
Miscellaneous
Literature Type
Thesis/Dissertation
Report Number
Country of publication
ELECTRIC CONDUCTIVITY, ELECTROMAGNETIC PULSES, LASER RADIATION, LATTICE PARAMETERS, NEAR INFRARED RADIATION, PHASE TRANSFORMATIONS, PHYSICAL RADIATION EFFECTS, REFLECTIVITY, SAMARIUM SULFIDES, TEMPERATURE DEPENDENCE, TEMPERATURE RANGE 0273-0400 K, TIME DEPENDENCE, VISIBLE RADIATION, X-RAY DIFFRACTION
CHALCOGENIDES, COHERENT SCATTERING, DIFFRACTION, ELECTRICAL PROPERTIES, ELECTROMAGNETIC RADIATION, INFRARED RADIATION, OPTICAL PROPERTIES, PHYSICAL PROPERTIES, PULSES, RADIATION EFFECTS, RADIATIONS, RARE EARTH COMPOUNDS, SAMARIUM COMPOUNDS, SCATTERING, SULFIDES, SULFUR COMPOUNDS, SURFACE PROPERTIES, TEMPERATURE RANGE
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