OPTICAL-PROPERTIES OF V, TA, AND MO FROM 0.1 TO 35 EV
OPTICAL-PROPERTIES OF V, TA, AND MO FROM 0.1 TO 35 EV
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DOI：
10.1103/physrevb.10.501
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发表时间：
1974-01-01
影响因子：
3.7
通讯作者：
OLSON, CG
中科院分区：
文献类型：
--
作者：
WEAVER, JH;LYNCH, DW;OLSON, CG
V、Ta和Mo的晶体的吸收率或反射率从0.1至35 eV测量。对数据进行Kramers-Kronig分析以确定介电函数。讨论了用简单的Drude模型描述低能吸收的不足。在介电函数的结构中讨论的直接带间跃迁延伸到约18 eV。低于6 eV的特征归因于V、Ta和Mo的在λ、G附近的跃迁，以及可能沿沿着P（D）N的跃迁，Mo中的额外跃迁来自布里渊区的Δ部分。高位能带被认为是介电函数中的高能结构。以前获得的Nb的结果进行了审查和比较。电子能量损失函数进行了计算，并讨论了体积和表面等离子体。这些金属都表现出两个体积和两个表面等离子体。
The absorptivity or reflectivity of crystals of V, Ta, and Mo was measured from 0.1 to 35 eV. The data were Kramers-Kronig analyzed to determine the dielectric functions. The inadequacy of a simple Drude model to describe absorption at low energy is discussed. Structure in the dielectric functions is discussed in terms of direct interband transitions which extend to about 18 eV. Features below 6 eV are attributed to transitions near Σ, G, and perhaps along P (D) N for V, Ta, and Mo, with additional transitions in Mo from the Δ portion of the Brillouin zone. High-lying energy bands are identified as giving rise to high-energy structure in the dielectric functions. Results obtained previously for Nb are reviewed and compared. The electron-energy-loss functions were calculated and are discussed in terms of volume and surface plasmons. These metals all exhibit two volume and two surface plasmons.