热致密氢中液-液相变的证据。
Evidence of a liquid-liquid phase transition in hot dense hydrogen.
机构信息
Lyman Laboratory of Physics, Harvard University, Cambridge, MA 02138, USA.
出版信息
Proc Natl Acad Sci U S A. 2013 May 14;110(20):8040-4. doi: 10.1073/pnas.1300718110. Epub 2013 Apr 29.
Abstract
We use pulsed-laser heating of hydrogen at static pressures in the megabar pressure region to search for the plasma phase transition to liquid atomic metallic hydrogen. We heat our samples substantially above the melting line and observe a plateau in a temperature vs. laser power curve that otherwise increases with power. This anomaly in the heating curve appears correlated with theoretical predictions for the plasma phase transition.
摘要
我们使用在兆巴压力区域的静态压力下的脉冲激光加热氢，以寻找等离子体向液态原子金属氢的相变。我们将样品加热到远高于熔化线的温度，并观察到温度与激光功率曲线的平台，否则该曲线会随着功率的增加而增加。加热曲线中的这种异常现象似乎与等离子体相变的理论预测有关。
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