title: Ultrafast Dynamics in Polar and Magnetic Semiconductors:  Optical and Free-Electron Laser Investigations
creator: Zhong, Yinpeng
subject: ddc-530
subject: 530 Physics
description: The ultrafast carrier and lattice dynamics in polar and ferromagnetic semiconductors were investigated using optical and X-ray free-electron laser. In polar semiconductor Li-doped CdTe, the influence of Coulomb screening and phonon-plasmon coupling in carrier and lattice dynamics was observed by means of a time resolved pump-probe reflectivity technique. When doping polar semiconductors with magnetic atoms, magnetic interactions are introduced, e.g., in ferromagnetic semiconductor Ga$_{1-x}$Mn$_{x}$As, the Mn doped GaAs. By applying the novel X-ray free-electron laser radiation, delivered by the Linac Coherent Light Source (LCLS), the time resolved X-ray diffraction was measured, which directly reveals the interplay between the laser excited carriers, acoustic phonon modes and spin order. Simultaneously, the evolution of hole quasi Fermi-level as a function of time and temperature was measured by the resonant X-ray emission spectroscopy.
date: 2013-01
type: Dissertation
type: info:eu-repo/semantics/doctoralThesis
type: NonPeerReviewed
format: application/pdf
identifier: https://archiv.ub.uni-heidelberg.de/volltextserverhttps://archiv.ub.uni-heidelberg.de/volltextserver/14312/1/thesis%28Yinpeng%20Zhong%29.pdf
identifier: DOI:10.11588/heidok.00014312
identifier: urn:nbn:de:bsz:16-heidok-143120
identifier:   Zhong, Yinpeng  (2013) Ultrafast Dynamics in Polar and Magnetic Semiconductors: Optical and Free-Electron Laser Investigations.  [Dissertation]     
relation: https://archiv.ub.uni-heidelberg.de/volltextserver/14312/
rights: info:eu-repo/semantics/openAccess
rights: http://archiv.ub.uni-heidelberg.de/volltextserver/help/license_urhg.html
language: eng