论文标题
角度分辨光发射的Huygens原理
The Huygens Principle of Angle-Resolved Photoemission
论文作者
论文摘要
角度分辨光发射光谱（ARPES）测量偶极子的干扰允许从各个轨道发射器中造成电子带的库仑小波。如果忽略了即将发出的电子的库仑散射，则这种Arpes的Huygens视图简化了Fraunhofer衍射实验，以及相关的横截面与轨道傅里叶横向变形。这种平面波近似（PWA）令人惊讶地描述了光电子分布，但未能再现依赖于动能的最终状态效应（例如二科主义）。然而，可以轻松地适应Arpes的Huygens原理，以使外向库仑波的变形和相移。这保留了PWA的强大身体直觉和低计算成本，但自然会捕获系统中的动量依赖性干扰效应，这些干扰效应到目前为止需要在从头启动水平上进行治疗，例如Rashba Systems Biag2和Agte中的线性二色性。
Angle-resolved photoemission spectroscopy (ARPES) measures the interference of dipole allowed Coulomb wavelets from the individual orbital emitters that contribute to an electronic band. If Coulomb scattering of the outgoing electron is neglected, this Huygens view of ARPES simplifies to a Fraunhofer diffraction experiment, and the relevant cross-sections to orbital Fouriertransforms. This plane wave approximation (PWA) is surprisingly descriptive of photoelectron distributions, but fails to reproduce kinetic energy dependent final state effects like dichroism. Yet, Huygens principle of ARPES can be easily adapted to allow for distortion and phase shift of the outgoing Coulomb wave. This retains the strong physical intuition and low computational cost of the PWA, but naturally captures momentum dependent interference effects in systems that so far required treatment at the ab initio level, such as linear dichroism in Rashba systems BiAg2 and AgTe.
