发表机构
Cornell University; Arizona State University(康奈尔大学; 亚利桑那州立大学)
机构由 AI 辅助整理,请以论文原文为准。AI 中文总结
研究光发射中电子被困问题,提出用从头算框架构建开放散射态消除人为边界,该方法能给出相关终态,对Ag(111)可预测绝对量子效率等实验数据。
AI 中文摘要
光发射是一个逃逸问题,但第一性原理计算通常将电子困在周期性盒子中。我们提出了一个无参数的从头算框架,通过从Wannier哈密顿量和格林函数嵌入构建半无限晶体-真空界面的开放散射态来消除这个人为边界。该方法给出了具有微观准粒子衰减的连续归一化时间反转LEED终态。对于Ag(111),它在实验尺度上预测了绝对量子效率、矢量光发射和平均横向能量。
英文摘要
Photoemission is an escape problem, yet first-principles calculations usually trap the electron in a periodic box. We present a parameter-free \emph{ab initio} framework that removes this artificial boundary by constructing open scattering states for semi-infinite crystal-vacuum interfaces from Wannier Hamiltonians and Green-function embedding. The method gives continuum-normalized time-reversed LEED final states with microscopic quasiparticle attenuation. For Ag(111), it predicts absolute quantum efficiency, vectorial photoemission, and mean transverse energy on the experimental scale.
CommentsTo be submitted to Physical Review Letters