摘要
Hill-like polycrystalline diamond grains(HPDGs)randomly emerged on a heavy boron-doped p+single-crystal diamond(SCD)film by prolonging the growth duration of the chemical vapor deposition process.The Raman spectral results confirm that a relatively higher boron concentration(~1.1×10^(21) cm^(-3))is detected on the HPDG with respect to the SCD region(~5.4×10^(20) cm^(-3)).It demonstrates that the Au/SCD interface can be modulated from ohmic to Schottky contact by varying the surface from hydrogen to oxygen termination.The current-voltage curve between two HPDGs is nearly linear with either oxygen or hydrogen termination,which means that the HPDGs provide a leakage path to form an ohmic contact.There are obvious rectification characteristics between oxygen-terminated HPDGs and SCD based on the difference in boron doping levels in those regions.The results reveal that the highly boron-doped HPDGs grown in SCD can be adopted as ohmic electrodes for Hall measurement and electronic devices.
作者
王旌丞
陈浩
万琳丰
牟草源
刘尧峰
成绍恒
王启亮
李柳暗
李红东
Jing-Cheng Wang;Hao Chen;Lin-Feng Wan;Cao-Yuan Mu;Yao-Feng Liu;Shao-Heng Cheng;Qi-Liang Wang;Liu-An Li;Hong-Dong Li(State Key Lab of Superhard Materials,College of Physics,Jilin University,Changchun 130012,China;Shenzhen Research Institute,Jilin University,Shenzhen 518057,China)
基金
Project supported by the Key-Area Research and Development Program of Guangdong Province(Grant No.2020B0101690001)
the National Natural Science Foundation of China(NSFC)(Grant No.51972135).