Epitaxial metallic β-Nb2N films grown by MBE on hexagonal SiC substrates

被引:41
|
作者
Katzer, D. Scott [1 ]
Nepal, Neeraj [2 ]
Meyer, David J. [1 ]
Downey, Brian P. [1 ]
Wheeler, Virginia D. [1 ]
Storm, David F. [1 ]
Hardy, Matthew T. [3 ]
机构
[1] US Naval Res Lab, Electromagnet Technol Branch, Washington, DC 20375 USA
[2] Sotera Def Solut, Herndon, VA 20171 USA
[3] US Naval Res Lab, Washington, DC 20375 USA
关键词
NBN THIN-FILMS; TEMPERATURE; CONSTANTS;
D O I
10.7567/APEX.8.085501
中图分类号
O59 [应用物理学];
学科分类号
摘要
RF-plasma MBE was used to epitaxially grow 4- to 100-nm-thick metallic beta-Nb2N thin films on hexagonal SiC substrates. When the N/Nb flux ratios are greater than one, the most critical parameter for high-quality beta-Nb2N is the substrate temperature. The X-ray characterization of films grown between 775 and 850 degrees C demonstrates beta-Nb2N phase formation. The (0002) and (21 (3) over bar1) X-ray diffraction measurements of a beta-Nb2N film grown at 850 degrees C reveal a 0.68% lattice mismatch to the 6H-SiC substrate. This suggests that beta-Nb2N can be used for high-quality metal/semiconductor heterostructures that cannot be fabricated at present. (C) 2015 The Japan Society of Applied Physics
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页数:4
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