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本文讨论了在温度4.2K,真空度为10~(-10)乇时,用Drude法测量Ta—W—Re合金从0.5至5电子伏特之光学常数。从Ta、W与Re的已知电子能带计算结果开始,根据△、G与Σ附近的直接跃迁讨论电介质函数?2的叠带部分的结构。这种合金光学特性之变化,不能单凭纯元素的电子能带之外推来解释。文中指出:在目前,对于Ta—W—Re合金的光学特性不可能找到一种完整的解释。如果考虑修改一下已计算出的能带结
In this paper, the optical constants of Ta-W-Re alloys from 0.5 to 5 eV were measured by the Drude method at a temperature of 4.2 K and a vacuum of 10 -10 Torr. The structure of the lamination of the dielectric function? 2 is discussed based on the known electronic band calculations for Ta, W and Re and direct transitions near?, G and ?. The change in the optical properties of this alloy can not be explained purely by extrapolation of pure elemental electronic energy bands. The article states: At present, it is impossible to find a complete explanation of the optical properties of Ta-W-Re alloy. If you think about changing the calculated energy banding