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Ultrafast charge relocation in an ionic crystal probed by femtosecond x-ray powder diffraction
2013
EPJ Web of Conferences
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Transient electron density maps of potassium dihydrogen phosphate (KH 2 PO 4 , KDP) are derived from femtosecond x-ray powder diffraction patterns. Upon photoexcitation, the low-frequency TO soft mode is elongated impulsively and modulates the electronic charge distribution on the length scale of interatomic distances, much larger than the vibrational amplitude of the nuclear motion. The results demonstrate a charge transfer from the volumes around the P-atoms to those containing the O-H· · ·O
doi:10.1051/epjconf/20134103021
fatcat:oiitg5sen5aurasouipvswacre