Shock Compressing Diamond to a Conducting Fluid
Abstract
Laser generated shock reflectance data show that diamond undergoes a continuous transition from optically absorbing to reflecting between Hugoniot pressures 600<PH<1000 GPa. The data are consistent with diamond having a thermal population of carriers at PH∼600 GPa, undergoing band overlap metallization at PH∼1000 GPa and melting at 800<PH<1000 GPa. The results agree well with an equation of state model that predicts that elemental carbon remains solid throughout the interior of Neptune.
- Publication:
-
Physical Review Letters
- Pub Date:
- November 2004
- DOI:
- Bibcode:
- 2004PhRvL..93s5506B
- Keywords:
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- 62.50.+p;
- 64.70.Dv;
- 71.30.+h;
- High-pressure and shock wave effects in solids and liquids;
- Solid-liquid transitions;
- Metal-insulator transitions and other electronic transitions