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Single crystal growth of GdB6 by the optical floating-zone technique
CrystEngComm ( IF 2.6 ) Pub Date : 2020-10-23 , DOI: 10.1039/d0ce01236j
Shu-yu Ning 1, 2, 3, 4, 5 , Xinyu Yang 1, 2, 3, 4, 5 , Yan Wang 1, 2, 3, 4, 5 , Zhongwen Zhu 1, 2, 3, 4, 5 , Jiuxing Zhang 1, 2, 3, 4, 5
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A high-quality and large-sized GdB6 single crystal was successfully prepared by using the optical floating zone method to accurately control the temperature and composition of the molten zone. A GdB6 [100] single crystal 25 mm in length and 5 mm in diameter was obtained. The full width at half-maximum (FWHM) of the X-ray rocking curves was 0.227°, which indicated that the as-grown GdB6 single crystal had a high quality. The maximum thermionic emission current density of the GdB6 single crystal was 6.73 A cm−2 at U = 4000 V and T = 1873 K, and the average work function was 2.99 eV. Combining first-principles calculations and experiments, the work function was found to monotonically increase as the size of the GdB6 single crystal changed from nanostructure (1D) to bulk (3D).

中文翻译:

通过光学浮区技术生长GdB6的单晶

通过使用光学浮区法来精确控制熔融区的温度和成分,成功制备了高质量,大尺寸的GdB 6单晶。获得了长度为25mm,直径为5mm的GdB 6 [100]单晶。X射线摇摆曲线的半峰全宽(FWHM)为0.227°,这表明生长的GdB 6单晶具有高质量。在U = 4000 V和T下,GdB 6单晶的最大热电子发射电流密度为6.73 A cm -2= 1873 K,平均功函数为2.99 eV。结合第一性原理的计算和实验,发现功函数随着GdB 6单晶的尺寸从纳米结构(1D)变为本体(3D)单调增加。
更新日期:2020-11-16
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