Optical Constants of Metals
Optical Constants of Metals
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金属的光学常数
DOI：
10.1103/physrev.117.663
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发表时间：
1960
期刊：
影响因子：
--
通讯作者：
M. Suffczyński
中科院分区：
文献类型：
--
作者：
M. Suffczyński
基于一个特定的模型，尝试计算带间对金属介电常数频率相关的贡献。考虑了带间跃迁阈值附近的频率区域。模型的重点放在布里渊带边界附近能带的弯曲上。当费米曲面接近区域边界或与区域边界有有限接触面积时，重点关注这些情况。将动量矩阵元取为常数，拟合得到的结果与实验发现的消光系数色散曲线的倾角一致。贵金属、铜、银、金的矩阵元素的平方值符合舒尔茨的实验数据，其比值为0.43:0.69:0.69。
A calculation of the interband contribution to the frequency dependent dielectric constant of metals is attempted based on a specific model. The frequency region near the threshold for the interband transitions is considered. Emphasis in the model is laid on the bending of the energy bands near the Brillouin zone boundary. Attention is focused on cases when the Fermi surface approaches the zone boundary or has a finite area of contact with it. The momentum matrix element is taken as constant, which is fitted so as to achieve agreement with the experimentally found dip in the dispersion curve of the extinction coefficient. The values of the square of the matrix element for the noble metals, copper, silver, and gold, which fit the experimental data of Schulz, are found to be in the ratio 0.43: 0.69: 0.69.