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Electrical conductivity and thermopower of metallic helium

机译：金属氦的电导率和热功率

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The pair effective interionic interaction, electrical resistance, and thermopower of liquid metallic helium have been calculated over wide temperature and density ranges using the perturbation theory for the potential of electron-ion interaction. For conduction electrons, the random-phase approximation has been used taking into account the exchange interaction and correlations in the local-field approximation. The nuclear subsystem has been described by the hard-sphere model. The sphere diameter is the only parameter of the theory. The diameter and the system density at which helium is transformed from the singly ionized to doubly ionized state have been estimated based on an analysis of the pair effective interaction between helium nuclei. The case of doubly ionized helium atoms has been considered. The numerical calculations have been performed taking into account the perturbation theory in terms up to the third order. In all cases, the role of the third-order correction is significant. In the case of metallic helium, the values of the electrical resistance and its temperature dependence are characteristic of divalent simple liquid metals, as well as the dependences of the thermopower on the density and temperature.
机译：液态金属氦的有效离子对相互作用，电阻和热功率已在较宽的温度和密度范围内使用扰动理论计算出了电子-离子相互作用的潜力。对于传导电子，已经考虑了交换相互作用和局部场近似中的相关性，使用了随机相位近似。核子系统已通过硬球模型进行了描述。球体直径是该理论的唯一参数。基于对氦原子核之间的有效相互作用对的分析，可以估算出氦从单离子化转变为双离子状态的直径和系统密度。已经考虑了双离子氦原子的情况。进行数值计算时考虑了扰动理论，直至三阶。在所有情况下，三阶校正的作用都很重要。在金属氦的情况下，电阻值及其对温度的依赖性是二价简单液态金属的特征，以及热功率对密度和温度的依赖性。

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