arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2003.00618cond-mat.mtrl-scicond-mat.mes-hall
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贵金属低温电子-声子弛豫的再认识

Revisiting the low temperature electron-phonon relaxation of noble metals

Shota Ono

摘要:

用密度泛函理论研究了贵金属Cu和Ag表面附近的低温电子-声子(e-ph)弛豫.表面声子模的出现可以引起低频下Eliashberg函数的强烈增强$ω$。假设Eliashberg函数与$ω$的平方在低频极限成正比,由表面计算得到的e-ph弛豫时间比由体计算得到的e-ph弛豫时间短。前者的e-ph弛豫时间的计算与最近的薄膜的实验结果一致。

英文摘要:

The low temperature electron-phonon (e-ph) relaxation near the surface of noble metals, Cu and Ag, is studied by using the density-functional theory approach. The appearance of the surface phonon mode can give rise to a strong enhancement of the Eliashberg function at low frequency $ω$. Assuming the Eliashberg function proportional to the square of $ω$ in the low frequency limit, the e-ph relaxation time obtained from the surface calculations is shorter than that from the bulk calculation. The calculated e-ph relaxation time for the former is in agreement with a recent experiment for thin films.

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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