在低电子-声子耦合离子径迹中获得超快加热速率
Reconciling anomalously fast heating rate in ion tracks with low electron-phonon coupling
摘要:
快速重离子径迹的形成需要激发电子和晶格之间极快的能量转移。然而,电子-声子能量交换太慢,如从激光照射实验和计算中所知。我们解决了这个矛盾,注意到电子-声子耦合不是电子和离子之间能量交换的唯一机制:电子的加热也会改变原子的势能面,加速它们并增加它们的动能。
英文摘要:
Formation of swift heavy ion tracks requires extremely fast energy transfer between excited electrons and a lattice. However, electron-phonon energy exchange is too slow, as known from laser-irradiation experiments and calculations. We resolve this contradiction noticing that electron-phonon coupling is not the sole mechanism of energy exchange between electrons and ions: heating of electrons also alters potential energy surface of atoms, accelerating them and increasing their kinetic energy.
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。