Transient lattice contraction in the solid-to-plasma transition.

نویسندگان

  • Ken R Ferguson
  • Maximilian Bucher
  • Tais Gorkhover
  • Sébastien Boutet
  • Hironobu Fukuzawa
  • Jason E Koglin
  • Yoshiaki Kumagai
  • Alberto Lutman
  • Agostino Marinelli
  • Marc Messerschmidt
  • Kiyonobu Nagaya
  • Jim Turner
  • Kiyoshi Ueda
  • Garth J Williams
  • Philip H Bucksbaum
  • Christoph Bostedt
چکیده

In condensed matter systems, strong optical excitations can induce phonon-driven processes that alter their mechanical properties. We report on a new phenomenon where a massive electronic excitation induces a collective change in the bond character that leads to transient lattice contraction. Single large van der Waals clusters were isochorically heated to a nanoplasma state with an intense 10-fs x-ray (pump) pulse. The structural evolution of the nanoplasma was probed with a second intense x-ray (probe) pulse, showing systematic contraction stemming from electron delocalization during the solid-to-plasma transition. These findings are relevant for any material in extreme conditions ranging from the time evolution of warm or hot dense matter to ultrafast imaging with intense x-ray pulses or, more generally, any situation that involves a condensed matter-to-plasma transition.

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عنوان ژورنال:
  • Science advances

دوره 2 1  شماره 

صفحات  -

تاریخ انتشار 2016