Identifying lithium K edge anisotropy in LiCoO2

Identifying lithium K edge anisotropy in LiCoO2
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识别 LiCoO2 中的锂 K 边缘各向异性

DOI:
10.1103/physrevb.98.075103
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发表时间:
2018
期刊:
影响因子:
3.7
通讯作者:
Koji Kimoto.
Koji Kimoto.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Jun Kikkawa;Teruyasu Mizoguchi;Masao Arai;Takuro Nagai;Koji Kimoto.

文献摘要

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使用散射矢量 (q) 相关的电子能量损失光谱 (EELS),我们发现了 Liexcitation 的各向异性。为了实现这一点,将 EELS 光谱(即 LiKedge 与边缘重叠)与偶极跃迁条件下的边缘光谱进行了比较。然后,应用损失函数的第一性原理计算和LiKedge的Bethe-Salpeter方程。我们还证明了依赖于晶体取向的 EELS 反映了 Liexitation 的各向异性。
Using scattering-vector (q)-dependent electron-energy-loss spectroscopy (EELS), we found anisotropy of Liexcitation for. To achieve this, EELS spectra for(i.e., LiKedge overlapped withedge) were compared with those ofedge forunder dipole transition conditions. Then, first-principles calculations of loss functions and the Bethe-Salpeter equation of LiKedge were applied for. We also demonstrate that crystallographic orientation-dependent EELS forreflects the anisotropy of Liexcitation.