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@MASTERSTHESIS{Schunck:427661,
      author       = {Schunck, Jan},
      othercontributors = {Beye, Martin and Schroer, Christian},
      title        = {{C}ombining resonant inelastic {X}-ray scattering with
                      micrometer resolution to image electronic properties of
                      quantum materials},
      school       = {University of Hamburg},
      type         = {Masterarbeit},
      reportid     = {PUBDB-2019-04127},
      pages        = {59 pages},
      year         = {2019},
      note         = {Masterarbeit, University of Hamburg, 2019},
      abstract     = {This thesis presents developments and results of an
                      experimental setup which combines soft X-ray spectroscopy
                      methods for electronic structure analysis and imaging
                      capabilities with the goal to gain detailed understanding of
                      quantum materials, which exhibit spatial electronic
                      inhomogeneities. The setup features a combination of two
                      Fresnel zone plates which are about 1mm long and sub-μm
                      wide: Firstly, a linear illumination zone plate creates a
                      vertical X-ray focus line on the sample. Secondly, an
                      off-axis zone plate, located between the sample and the
                      two-dimensional detector, disperses X-rays emitted from the
                      sample in horizontal direction, while also imaging the
                      sample onto the detector at the same time. In this way, a 2D
                      map is created on the detector which, in the vertical
                      dimension, contains information on the position on the
                      sample from where the X-rays are emitted, and in the
                      horizontal dimension resolves the photon energies emitted
                      from the sample. The presented experiment was performed at
                      the soft X-ray beamline P04 of the synchrotron radiation
                      source PETRA III at the DESY research facility in Hamburg.
                      In the first part of the experiment, the spatial resolution
                      of the setup was determined to be better than 3 μm.
                      Secondly, this spatial resolution was combined with X-ray
                      absorption (XAS) and resonant inelastic X-ray scattering
                      (RIXS) measurements at the oxygen Kedge to investigate the
                      insulator-to-metal phase transition of VO2 microsquares with
                      an edge length of 30 μm. These structures were studied, in
                      order to answer the question if the phase transition
                      behaviour is different in structured parts of a sample,
                      where the defect density at the edges of structures may act
                      as nucleation centres. This is compared to the central area
                      of the squares acting as a model for a bulk material
                      reference. This is an important step towards functionalising
                      phase transitions in complex materials, where insights from
                      bulk materials may not readily be transferred to structured
                      devices.},
      cin          = {FS-FLASH},
      cid          = {I:(DE-H253)FS-FLASH-20140814},
      pnm          = {6G3 - PETRA III (POF3-622) / 6214 - Nanoscience and
                      Materials for Information Technology (POF3-621) /
                      FS-Proposal: I-20180454 (I-20180454) / VH-NG-1105 - Novel
                      soft X-ray spectroscopies for materials science
                      $(2016_IVF-VH-NG-1105)$},
      pid          = {G:(DE-HGF)POF3-6G3 / G:(DE-HGF)POF3-6214 /
                      G:(DE-H253)I-20180454 / $G:(DE-HGF)2016_IVF-VH-NG-1105$},
      experiment   = {EXP:(DE-H253)P-P04-20150101},
      typ          = {PUB:(DE-HGF)19},
      url          = {https://bib-pubdb1.desy.de/record/427661},
}