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Transport properties of warm dense neon and krypton at high pressures
Physical Review E ( IF 2.2 ) Pub Date : 2020-10-26 , DOI: 10.1103/physreve.102.043214
Y. J. Gu , W. L. Quan , G. Yang , M. J. Tan , L. Liu , Q. F. Chen

The transport properties of warm dense neon (Ne) and krypton (Kr) are studied by combining self-consistent fluid variational theory (SFVT) with linear response theory (LRT). The components are determined using the SFVT, and the transport parameters, including the electrical conductivity, thermal conductivity, and thermopower, are calculated with the LRT. The relevant scattering mechanisms, including electron-ion, electron-electron, and electron-atom scatterings, are taken into account. An effective potential model in combination with the Muffin-tin model is introduced to further improve the description for electron-atom scattering, which not only includes static, exchange, and polarization interactions but also considers the plasma environmental effects. It is found that for electron-atom scattering, the influence of the plasma density is significant at lower scattering energies but the effects are different for electron-Ne and electron-Kr scattering. For electron-Kr scattering, a plasma density-dependent Ramsauer-Townsend minimum is observed. The obtained transport parameters are compared with the available experiments and other simulations. The plasma phase transition of warm dense Kr is revisited from multiple perspectives based on the numerical simulation results for the electrical conductivity and thermopower. These observations may help one to better understand the transport properties of warm dense noble gases and are an important guide for future experimental designs and theoretical developments.

中文翻译:

高压下高密度氖和k的传输特性

结合自洽流体变分理论(SFVT)和线性响应理论(LRT),研究了热致密氖(Ne)和k(Kr)的输运性质。使用SFVT确定成分,并使用LRT计算传输参数,包括电导率,热导率和热功率。考虑了相关的散射机制,包括电子-离子,电子-电子和电子-原子散射。引入了一种有效的电势模型与Muffin-tin模型相结合,以进一步改进对电子-原子散射的描述,该描述不仅包括静电,交换和极化相互作用,还考虑了等离子体的环境影响。发现对于电子原子散射,等离子体密度的影响在较低的散射能量下很明显,但对于电子-Ne和电子-Kr散射的影响却不同。对于电子-Kr散射,观察到了等离子体密度相关的Ramsauer-Townsend最小值。将获得的运输参数与可用的实验和其他模拟进行比较。基于电导率和热功率的数值模拟结果,从多个角度重新探讨了暖致密Kr的等离子体相变。这些观察结果可能有助于人们更好地理解温暖的稀有惰性气体的传输特性,并且为将来的实验设计和理论发展提供了重要的指导。观察到血浆密度依赖性的Ramsauer-Townsend最小值。将获得的运输参数与可用的实验和其他模拟进行比较。基于电导率和热功率的数值模拟结果,从多个角度重新探讨了暖致密Kr的等离子体相变。这些观察结果可能有助于人们更好地理解温暖的稀有惰性气体的传输特性,并且为将来的实验设计和理论发展提供了重要的指导。观察到血浆密度依赖性的Ramsauer-Townsend最小值。将获得的运输参数与可用的实验和其他模拟进行比较。基于电导率和热功率的数值模拟结果,从多个角度重新探讨了暖致密Kr的等离子体相变。这些观察结果可能有助于人们更好地理解温暖的稀有惰性气体的传输特性,并且为将来的实验设计和理论发展提供了重要的指导。基于电导率和热功率的数值模拟结果,从多个角度重新探讨了暖致密Kr的等离子体相变。这些观察结果可能有助于人们更好地理解温暖的稀有惰性气体的传输特性,并且为将来的实验设计和理论发展提供了重要的指导。基于电导率和热功率的数值模拟结果,从多个角度重新探讨了暖致密Kr的等离子体相变。这些观察结果可能有助于人们更好地理解温暖的稀有惰性气体的传输特性,并且为将来的实验设计和理论发展提供了重要的指导。
更新日期:2020-10-30
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