An ab-initio Study of Optical Properties of Co2VSi and Co2VGe Alloys

被引：2
作者：
Seema, K. [1 ]
机构：
[1] PGGC, Dept Phys, Sect 11, Chandigarh 160011, India
来源：
61ST DAE-SOLID STATE PHYSICS SYMPOSIUM | 2017年 / 1832卷
关键词：
Optical properties; DFT; Heusler alloys;
D O I：
10.1063/1.4980769
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The optical properties such as dielectric function, optical conductivity, and energy loss function (ELF) of bulk L2(1) ordered Co2VSi and Co2VGe Heusler alloys are calculated and their spectra have been analyzed. We have used first principles method to study optical properties. There are several peaks in the optical conductivity spectra and are related to bulk plasmon excitations. The main peak in the OC spectra is observed in visible region for both the compounds. A prominent peak in imaginary part of dielectric function is observed near 1eV. The maximum reflectivity for the compounds studied is found to be in visible region. The ELF spectra show a single sharp resonance peak which corresponds to a transition from the metallic property to dielectric property. The reflection edge for alloys under study has been found in UV region.
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页数：3
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