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VOLUME 75 | ISSUE 2 | PAGE 96
Ultrafast structural transformations in graphite
S. I. Ashitkov, M. B. Agranat, P. S. Kondratenko, S. I. Anisimov, V. E. Fortov, V. V. Temnov+, K. Sokolowski-Tinten+, P. Zhou+, D. von der Linde+
Institute of High Energy Density, Joint Institute for High Temperatures RAS, 127412 Moscow, Russia
+Institute for Laser and Plasma Physics, University of Essen, 45117 Essen, Germany


PACS: 63.90.+t, 78.90.+t
Abstract
Femtosecond laser-induced structural transitions in graphite were studied with time-resolved optical anisotropy measurements. The decay of the anisotropic reflectivity seems to indicate a loss of long-range order on a sub-picosecond time-scale, which is much faster than the electron-phonon relaxation time. This observation confirms a non-thermal nature of the structural transition.


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