Anisotropy in the optical response of superconducting MgB2 filMS

被引：0
|
作者：
Zelezny, V. [1 ]
Chvostova, D. [1 ]
Tarasenko, A. [1 ]
Klein, N. [2 ,3 ]
Xi, X. X. [4 ]
机构：
[1] Acad Sci Czech Republ, Inst Phys, Prague 18221 8, Czech Republic
[2] Forschungszentrum Julich, Inst Bio & Nanosyst, D-52425 Julich, Germany
[3] Forschungszentrum Julich, Ctr Nanoelect Syst Informat Technol, D-52425 Julich, Germany
[4] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA
来源：
THIN SOLID FILMS | 2008年 / 516卷 / 21期
关键词：
anisotropy; magnesium boride; thin films; ellipsometry;
D O I：
10.1016/j.tsf.2008.03.026
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The anisotropy of the dielectric function of c-axis oriented MgB2 thin films has been revealed by a combined study of normal-incident reflectance and spectroscopic ellipsometry. The application of this procedure enabled us to determine the complete set of optical response functions and to show that the dominant effect responsible for the anisotropy is due to interband transitions, which distinctly screen the plasma edge depending on the polarization of incident radiation. The most important transition occurs at 23,800 cm(-1) and is polarized in the ab-plane. This is in good agreement with the results obtained previously for single crystals. Our results are also in a qualitative agreement with those obtained by band structure calculations. (c) 2008 Elsevier B. V. All rights reserved.
引用
收藏
页码：7758 / 7763
页数：6
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