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@ARTICLE{Beye:167779,
      author       = {Beye, M. and Schreck, S. and Sorgenfrei, F. and Trabant, C.
                      and Pontius, N. and Schüßler-Langeheine, C. and Wurth, W.
                      and Föhlisch, A.},
      title        = {{S}timulated {X}-ray emission for materials science},
      journal      = {Nature},
      volume       = {501},
      number       = {7466},
      issn         = {1476-4687},
      address      = {London},
      publisher    = {Macmillan28177},
      reportid     = {DESY-2014-02110},
      pages        = {191 - 194},
      year         = {2013},
      note         = {© Macmillan Publishers Limited.},
      abstract     = {Resonant inelastic X-ray scattering and X-ray emission
                      spectroscopy can be used to probe the energy and dispersion
                      of the elementary low-energy excitations that govern
                      functionality in matter: vibronic, charge, spin and orbital
                      excitations. A key drawback of resonant inelastic X-ray
                      scattering has been the need for high photon densities to
                      compensate for fluorescence yields of less than a per cent
                      for soft X-rays8. Sample damage from the dominant
                      non-radiative decays thus limits the materials to which such
                      techniques can be applied and the spectral resolution that
                      can be obtained. A means of improving the yield is therefore
                      highly desirable. Here we demonstrate stimulated X-ray
                      emission for crystalline silicon at photon densities that
                      are easily achievable with free-electron lasers. The
                      stimulated radiative decay of core excited species at the
                      expense of non-radiative processes reduces sample damage and
                      permits narrow-bandwidth detection in the directed beam of
                      stimulated radiation. We deduce how stimulated X-ray
                      emission can be enhanced by several orders of magnitude to
                      provide, with high yield and reduced sample damage, a
                      superior probe for low-energy excitations and their
                      dispersion in matter. This is the first step to bringing
                      nonlinear X-ray physics in the condensed phase from theory
                      to application.},
      cin          = {DOOR / UNI/EXP},
      ddc          = {070},
      cid          = {I:(DE-H253)HAS-User-20120731 /
                      $I:(DE-H253)UNI_EXP-20120731$},
      pnm          = {FLASH Beamline PG2 (POF2-54G16) / FLASH Beamline BL2
                      (POF2-54G16)},
      pid          = {G:(DE-H253)POF2-PG2-20130405 /
                      G:(DE-H253)POF2-BL2-20130405},
      experiment   = {EXP:(DE-H253)F-PG2-20150101 / EXP:(DE-H253)F-BL2-20150101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000324244900034},
      pubmed       = {pmid:23965622},
      doi          = {10.1038/nature12449},
      url          = {https://bib-pubdb1.desy.de/record/167779},
}