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arXiv 1504.00259cond-mat.mtrl-sci
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金属氢的一级相变

A First-order Phase Transition to Metallic Hydrogen

Mohamed Zaghoo, Ashkan Salamat, Isaac F. Silvera

摘要:

氢的绝缘体-金属相变是凝聚态物理中最突出的问题之一。现在预测高压金属相从T=0 K到非常高的温度是液态原子。我们在1.1-1.7毫巴和2200 K的温度范围内对热重氢的光学性质进行了测量。我们观察到一级相变伴随着金属的透射率和反射率特性的变化。这种转变的相线具有与所谓的等离子体相变理论一致的负斜率。

英文摘要:

The insulator-metal transition in hydrogen is one of the most outstanding problems in condensed matter physics. The high-pressure metallic phase is now predicted to be liquid atomic from T=0 K to very high temperatures. We have conducted measurements of optical properties of hot dense hydrogen in the region of 1.1-1.7 Mbar and up to 2200 K. We observe a first-order phase transition accompanied by changes in transmittance and reflectance characteristic of a metal. The phase line of this transition has a negative slope in agreement with theories of the so-called plasma phase transition.

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