论文标题
重新访问高温金属的低温电子 - 音波松弛
Revisiting the low temperature electron-phonon relaxation of noble metals
论文作者
论文摘要
使用密度功能理论方法研究了贵金属，Cu和Ag表面附近的低温电子phonon（E-PH）松弛。表面声子模式的外观会导致在低频$ω$下的Eliashberg功能的强大增强。假设在低频限制中与$ω$的平方成正比的EliAshberg函数，从表面计算获得的E-PH松弛时间比从整体计算中短。前者计算出的E-PH松弛时间与最近的薄膜实验一致。
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.
