热态稠密一氧化碳的量子分子动力学模拟
Quantum molecular dynamic simulations of warm dense carbon monoxide
摘要:
采用量子分子动力学模拟方法,研究了极端条件下热重态一氧化碳的热物理性质。从状态方程导出的主Hugoniot与实验数据在67 GPa范围内吻合得很好。用对关联函数预测了8 GPa下一氧化碳的化学分解。根据Kubo-Greenwood公式,测定了冲击压缩CO的直流电导率和光学反射率,并在43 GPa附近观察到了非金属-金属相变。
英文摘要:
Using quantum molecular dynamic simulations, we have studied the thermophysical properties of warm dense carbon monoxide under extreme conditions. The principal Hugoniot, which is derived from the equation of state, shows excellent agreement with available experimental data up to 67 GPa. The chemical decomposition of carbon monoxide has been predicted at 8 GPa by means of pair correlation function. Based on Kubo-Greenwood formula, the dc electrical conductivity and the optical reflectivity are determined, and the nonmetal-metal transition for shock compressed carbon monoxide is observed around 43 GPa.
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