Absorption of Soft X Rays by Insulators with a Forbidden Exciton Transition
Absorption of Soft X Rays by Insulators with a Forbidden Exciton Transition
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禁止激子跃迁的绝缘体对软 X 射线的吸收
DOI：
10.1103/physrevlett.31.756
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发表时间：
1973
影响因子：
8.6
通讯作者：
T. Collins
中科院分区：
文献类型：
--
作者：
A. Kunz;D. Mickish;T. Collins
本文研究了从芯态到导带的最低激子跃迁被禁止的绝缘晶体对软X射线辐射的吸收。我们认为，一个适当的描述必须超越简单的Hartree-Fock带理论，并应包括大量的能量校正，由于空穴是一个本地的现象，在吸收过程中，以及大量的校正，由于电子-电子相互作用。对LiF作了近似计算。
In this note, we consider the absorption of soft x-ray radiation by an insulating crystal for which the lowest excitonic transition from the core state to the conduction band is forbidden. We argue that a proper description must go beyond simple Hartree-Fock band theory and should include substantial energy corrections due to the hole being a local phenomenon during the absorption process, as well as substantial corrections due to electron-electron interactions. Approximate calculations are made for LiF.