Conductivity of warm dense matter including electron-electron collisions
Conductivity of warm dense matter including electron-electron collisions
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DOI：
10.1103/physreve.91.043105
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发表时间：
2015-04-21
影响因子：
2.4
通讯作者：
Redmer, R.
中科院分区：
文献类型：
--
作者：
Reinholz, H.;Roepke, G.;Redmer, R.
我们提出了一种方法，可以解决有关电子-电子碰撞在计算致密等离子体动态电导率中的作用的争议。特别是，在低密度、非简并极限下分析直流电导率，其中斯皮策理论有效，并且与仅考虑电子-离子碰撞的结果（洛伦兹模型）相比，电子-电子碰撞导致众所周知的降低。随着简并度的增加，电子-电子碰撞对直流电导率的贡献正在减小，对于适用兹曼理论的液态金属域可以忽略不计。我们给出了电子-电子碰撞在计算热致密物质区域（即任意简并的强耦合库仑系统）电导率时的影响的表达式。
We present an approach that can resolve the controversy with respect to the role of electron-electron collisions in calculating the dynamic conductivity of dense plasmas. In particular, the dc conductivity is analyzed in the low-density, nondegenerate limit where the Spitzer theory is valid and electron-electron collisions lead to the well-known reduction in comparison to the result considering only electron-ion collisions (Lorentz model). With increasing degeneracy, the contribution of electron-electron collisions to the dc conductivity is decreasing and can be neglected for the liquid metal domain where the Ziman theory is applicable. We give expressions for the effect of electron-electron collisions in calculating the conductivity in the warm dense matter region, i.e., for strongly coupled Coulomb systems at arbitrary degeneracy.