By using femtosecond laser excitation, non-thermal melting of fullerite has been experimentally achieved. Because the ultrafast, non-thermal transition occurs approximately at constant volume, the density of the resulting liquid is 25% lower than for non-thermally molten graphite. Tight-binding molecular-dynamics simulations indicate the formation of the low-density liquid phase, composed by sp-bonded chains at 7900 K and 7 GPa. The extracted dc resistivity of the liquid (2 mΩ cm) is in agreement with theoretical predictions (2.5 mΩ cm) for the equilibrium low-density phase.
Cavalleri, A., Sokolowski Tinten, K., Linde, D., Spagnolatti, I., Bernasconi, M., Benedek, G., et al. (2002). Generation of the low-density liquid phase of carbon by non-thermal melting of fullerite. EUROPHYSICS LETTERS, 57(2), 281-287 [10.1209/epl/i2002-00573-x].
Generation of the low-density liquid phase of carbon by non-thermal melting of fullerite
BERNASCONI, MARCO;BENEDEK, GIORGIO;
2002
Abstract
By using femtosecond laser excitation, non-thermal melting of fullerite has been experimentally achieved. Because the ultrafast, non-thermal transition occurs approximately at constant volume, the density of the resulting liquid is 25% lower than for non-thermally molten graphite. Tight-binding molecular-dynamics simulations indicate the formation of the low-density liquid phase, composed by sp-bonded chains at 7900 K and 7 GPa. The extracted dc resistivity of the liquid (2 mΩ cm) is in agreement with theoretical predictions (2.5 mΩ cm) for the equilibrium low-density phase.
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