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Quantitative hyperspectral coherent diffractive imaging spectroscopy of a solid-state phase transition in vanadium dioxide

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DOI

  • Allan S. Johnson, The Barcelona Institute of Science and Technology (BIST)
  • ,
  • Jordi Valls Conesa, The Barcelona Institute of Science and Technology (BIST)
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  • Luciana Vidas, The Barcelona Institute of Science and Technology (BIST)
  • ,
  • Daniel Perez-Salinas, The Barcelona Institute of Science and Technology (BIST)
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  • Christian M. Günther, Technical University of Berlin
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  • Bastian Pfau, Max-Born-Institute for Nonlinear Optics and Short Pulse Spectroscopy
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  • Kent A. Hallman, Vanderbilt University
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  • Richard F. Haglund, Vanderbilt University
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  • Stefan Eisebitt, Technical University of Berlin, Max-Born-Institute for Nonlinear Optics and Short Pulse Spectroscopy
  • ,
  • Simon Wall

Solid-state systems can host a variety of thermodynamic phases that can be controlled with magnetic fields, strain, or laser excitation. Many phases that are believed to exhibit exotic properties only exist on the nanoscale, coexisting with other phases that make them challenging to study, as measurements require both nanometer spatial resolution and spectroscopic information, which are not easily accessible with traditional x-ray spectromicroscopy techniques. Here, we use coherent diffractive imaging spectroscopy (CDIS) to acquire quantitative hyperspectral images of the prototypical quantum material vanadium oxide across the vanadium L2,3 and oxygen K x-ray absorption edges with nanometer-scale resolution. We extract the full complex refractive indices of the monoclinic insulating and rutile conducting phases of VO2 from a single sample and find no evidence for correlation-driven phase transitions. CDIS will enable quantitative full-field x-ray spectromicroscopy for studying phase separation in time-resolved experiments and other extreme sample environments where other methods cannot operate.

Original languageEnglish
Article numbereabf1386
JournalScience Advances
Volume7
Issue33
ISSN2375-2548
DOIs
Publication statusPublished - Aug 2021

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