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arXiv 2103.08185cond-mat.mtrl-scicond-mat.other
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金属中带间和带内跃迁对电子-声子耦合的贡献

Contribution of inter- and intraband transitions into electron-phonon coupling in metals

Nikita Medvedev, Igor Milov

摘要:

我们最近发展了一种基于紧束缚分子动力学模拟计算材料中电子-声子(更一般情况下是电子-离子)耦合的方法。在目前的工作中,我们利用这种方法来研究部分贡献的带间和带内电子散射事件到总的电子-声子耦合在Al,Au,Cu元素金属和AlCu合金。结果表明,Al和AlCu的带间散射在电子-离子能量交换过程中起重要作用,而Au和Cu的带内$d-d$跃迁占主导地位.此外,带间和带内跃迁表现出不同的电子温度依赖性。我们的研究结果应该考虑到解释的实验结果的电子-声子耦合参数。

英文摘要:

We recently developed an approach for calculation of the electron-phonon (electron-ion in a more general case) coupling in materials based on tight-binding molecular dynamics simulations. In the present work we utilize this approach to study partial contributions of inter- and intraband electron scattering events into total electron-phonon coupling in Al, Au, Cu elemental metals and in AlCu alloy. We demonstrate that the interband scattering plays an important role in electron-ion energy exchange process in Al and AlCu, whereas intraband $d-d$ transitions are dominant in Au and Cu. Moreover, inter- and intraband transitions exhibit qualitatively different dependencies on the electron temperature. Our findings should be taken into account for interpretation of experimental results on electron-phonon coupling parameter.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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