Comment on "Isochoric, isobaric, and ultrafast conductivities of aluminum, lithium, and carbon in the warm dense matter regime".

Comment on "Isochoric, isobaric, and ultrafast conductivities of aluminum, lithium, and carbon in the warm dense matter regime".
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对“热致密物质体系中铝、锂和碳的等容、等压和超快电导率”的评论

DOI:
10.1103/physreve.99.047201
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发表时间:
2019
期刊:
Physical review. E
影响因子:
--
通讯作者:
R. Redmer
R. Redmer
中科院分区:
--
文献类型:
--
作者:
B. B. L. Witte;G. Röpke;P. Neumayer;M. French;P. Sperling;V. Recoules;S. H. Glenzer;R. Redmer

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Dharma-wardanaet al. [M. W. C. Dharma-wardana,Phys. Rev. E 96,053206(2017)2470-004510.1103/PhysRevE.96.053206]最近计算了温暖致密物质以及称为“超快物质”(UFM)的非平衡双温态的动态电导率[M. W. C. Dharma-wardana,Phys.Rev.E93,063205(2016)2470-004510.1103/PhysRevE.93.063205]。在这篇评论中,我们提出了两个明显的原因,为什么这些UFM计算既不适合于计算动态电导率,也不适合于计算等容加热的温暖的致密铝的X射线汤姆逊散射光谱。首先,离子-离子结构因子,一个主要的输入到电导率和散射光谱计算,强烈偏离等容加热的铝。其次,动态电导率不显示非德鲁德行为,这是一个必要的先决条件,在铝中的吸收行为的正确描述。此外,我们澄清了达摩-瓦尔达纳等人关于聚集体电导率测量的误解[G。R. Gathers,Int. J. Thermophys. 4,209(1983)IJTHDY0195-928X10.1007/BF 00502353]。
Dharma-wardanaet al.[M. W. C. Dharma-wardana , Phys. Rev. E 96, 053206 (2017)2470-004510.1103/PhysRevE.96.053206] recently calculated dynamic electrical conductivities for warm dense matter as well as for nonequilibrium two-temperature states termed “ultrafast matter” (UFM) [M. W. C. Dharma-wardana, Phys. Rev. E 93, 063205 (2016)2470-004510.1103/PhysRevE.93.063205]. In this Comment we present two evident reasons why these UFM calculations are neither suited to calculate dynamic conductivities nor x-ray Thomson scattering spectra in isochorically heated warm dense aluminum. First, the ion-ion structure factor, a major input into the conductivity and scattering spectra calculations, deviates strongly from that of isochorically heated aluminum. Second, the dynamic conductivity does not show a non-Drude behavior which is an essential prerequisite for a correct description of the absorption behavior in aluminum. Additionally, we clarify misinterpretations by Dharma-wardanaet al.concerning the conductivity measurements of Gathers [G. R. Gathers, Int. J. Thermophys. 4, 209 (1983)IJTHDY0195-928X10.1007/BF00502353].
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