Reduction of electron-phonon coupling in warm dense iron

A. Fernandez-Panella; T. Ogitsu; K. Engelhorn; A. A. Correa; B. Barbrel; S. Hamel; D. G. Prendergast; D. Pemmaraju; M. A. Beckwith; L. J. Bae; J. W. Lee; B. I. Cho; P. A. Heimann; R. W. Falcone; Y. Ping

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Reduction of electron-phonon coupling in warm dense iron

机译：在温热致密铁中减少电子 - 声子耦合

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The electron-ion relaxation dynamics in warm dense iron were investigated by time-resolved x-ray absorption near-edge spectroscopy (XANES). A novel analysis, combining ab initio density functional theory (DFT) and two temperature model (TTM) simulations, was developed to calculate the x-ray absorption spectra as a function of delay time. Here we present experimental evidence of changes at the XAS L3 edge of iron that are consistent with the reduction of the electron-phonon coupling under warm dense matter conditions. The experimental results are in agreement with the model that takes both the electron (T_e) and the ion temperature (T_i)) dependence of the thermophysical properties into consideration, while models where either constant electron-phonon coupling factor (G) or only T_e-dependent G are used do not agree with the observed relaxation dynamics of iron.

机译：通过时间分辨的X射线吸收近边光谱（Xanes）研究了温致密铁中的电子离子松弛动力学。开发了一种新的分析，结合AB Initio密度功能理论（DFT）和两个温度模型（TTM）模拟，以计算X射线吸收光谱作为延迟时间的函数。在这里，我们呈现了铁的XAS L3边缘的变化的实验证据，其与在温热致密的物质条件下的电子 - 声子偶联的减少相一致。实验结果与采用电子（T_E）和离子温度（T_I）的模型一致考虑到热物理性能的模型，而恒定电子 - 声子耦合因子（G）或仅T_E-的模型使用依赖性g与观察到的熨斗动态不同意。

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《Physical review》 |2020年第18期|184309.1-184309.11|共11页
作者
A. Fernandez-Panella; T. Ogitsu; K. Engelhorn; A. A. Correa; B. Barbrel; S. Hamel; D. G. Prendergast; D. Pemmaraju; M. A. Beckwith; L. J. Bae; J. W. Lee; B. I. Cho; P. A. Heimann; R. W. Falcone; Y. Ping;
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Lawrence Livermore National Laboratory Livermore California 94550 USA;

Lawrence Livermore National Laboratory Livermore California 94550 USA;

Advanced Light Source Lawrence Berkeley National Laboratory Berkeley California 94720 USA;

Lawrence Livermore National Laboratory Livermore California 94550 USA;

Department of Physics UC Berkeley Berkeley California 94720 USA;

Lawrence Livermore National Laboratory Livermore California 94550 USA;

The Molecular Foundry Lawrence Berkeley National Laboratory Berkeley California 94720 USA;

The Molecular Foundry Lawrence Berkeley National Laboratory Berkeley California 94720 USA;

Lawrence Livermore National Laboratory Livermore California 94550 USA;

Department of Physics and Photon Science Gwangju Institute of Science and Technology Gwangju Korea;

Department of Physics and Photon Science Gwangju Institute of Science and Technology Gwangju Korea;

Department of Physics and Photon Science Gwangju Institute of Science and Technology Gwangju Korea;

Linac Coherent Light Source SLAC National Accelerator Laboratory Menlo Park California 94025 USA;

Department of Physics UC Berkeley Berkeley California 94720 USA;

Lawrence Livermore National Laboratory Livermore California 94550 USA;

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1. Reduction of electron-phonon coupling in warm dense iron [J] . Fernandez-Panella A., Ogitsu T., Engelhorn K., Physical review, B . 2020,第18期

机译：在温热致密铁中减少电子 - 声子耦合
2. Strain-induced modulations of electronic structure and electron-phonon coupling in dense H3S [J] . Liu Chang, Zhai Hang, Sun Ying, Physical chemistry chemical physics: PCCP . 2018,第8期

机译：应变诱导的电子结构和电子 - 声子耦合致密H3s的耦合
3. Topotactic intercalation of a metallic dense host matrix chalcogenide with large electron-phonon coupling: Crystal structures and electronic properties of LixMo2SbS2 (0 <= x < 0.7) [J] . Lappas A, Nuttall CJ, Fthenakis ZG, Chemistry of Materials: A Publication of the American Chemistry Society . 2007,第26期

机译：具有大的电子-声子耦合的金属致密主体基质硫族化物的定规插入：LixMo2SbS2（0 <= x <0.7）的晶体结构和电子性质
4. X-ray scattering from warm dense iron [C] . White, S, Nersisyan, G, Dzelzainis, TWJ, IEEE International Conference on Plasma Science;ICOPS 2012 . 2012

机译：高温致密铁的X射线散射
5. Light-matter interactions in semiconductor nanowires: Light-effect transistor and light-induced changes in electron-phonon coupling and electrical characteristics. [D] . Marmon, Jason Kendrick. 2016

机译：半导体纳米线中的光-物质相互作用：光效应晶体管以及电子-声子耦合和电特性的光诱导变化。
6. Effective bias warm-up time reduction for MEMS gyroscopes based on active suppression of the coupling stiffness [O] . Jian Cui, Qiancheng Zhao, Guizhen Yan 2019

机译：基于主动抑制耦合刚度的MEMS陀螺仪有效降低偏置预热时间
7. Topotactic Intercalation of a Metallic Dense Host Matrix Chalcogenide with Large Electron-Phonon Coupling: Crystal Structures and Electronic Properties of LixMo2SbS2 (0e x {siComponents}amp;0.7) [O] . -1

机译：具有大型电子 - 声子耦合的金属致密宿主基质的拓扑插入：Lixmo2SBS2的晶体结构和电子性质（0e x {sicomponents} amp; 0.7）

Reduction of electron-phonon coupling in warm dense iron

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