Heavily boron-doped thick diamond films with higher superconducting transition temperatures have been prepared by electron assisted chemical vapour deposition method. The results of scanning electron microscopy, Raman...Heavily boron-doped thick diamond films with higher superconducting transition temperatures have been prepared by electron assisted chemical vapour deposition method. The results of scanning electron microscopy, Raman spectroscopy, x-ray diffraction, and Hall effect indicate that the films have nice crystalline facets, a notable decrease in the growth rate, and an increase in the tensile stress. Meanwhile, the film resistivity decreases with the increase of the carrier concentration. Our measurements show that the films with 4.88×10^20 cm^-3 and 1.61×10^21 cm^-3 carrier concentration have superconductivity, with onset temperatures of 9.7 K （8.9K for zero resistance） and 7.8 K （6.1 K for zero resistance）, respectively.展开更多
文摘Heavily boron-doped thick diamond films with higher superconducting transition temperatures have been prepared by electron assisted chemical vapour deposition method. The results of scanning electron microscopy, Raman spectroscopy, x-ray diffraction, and Hall effect indicate that the films have nice crystalline facets, a notable decrease in the growth rate, and an increase in the tensile stress. Meanwhile, the film resistivity decreases with the increase of the carrier concentration. Our measurements show that the films with 4.88×10^20 cm^-3 and 1.61×10^21 cm^-3 carrier concentration have superconductivity, with onset temperatures of 9.7 K （8.9K for zero resistance） and 7.8 K （6.1 K for zero resistance）, respectively.
基金National Natural Science Foundation of China(51965047)Natural Science Foundation of Inner Mongolia(2018MS06007)+2 种基金Higher Education Scientific Research Project of Inner Mongolia(NJZY18252)Research Startup Fund of High-Level Talents Introduction in 2018(21700-5185131)Research Startup Fund of High-Level Talents Introduction in 2018(21700-5185128).
