Guangdong Academy of Sciences (GDAS) - Institute of Semiconductors, National Cheng Kung University - Department of Physics, Tribhuvan University - Central Department of Physics, South China Normal University - Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, National Chiao Tung University - Department of Materials Science and Engineering, Helmholtz-Zentrum Dresden-Rossendorf (HZDR) - Institute of Ion Beam Physics and Materials Research, National Tsing Hua University - Department of Physics, National Chiao Tung University - Department of Materials Science and Engineering, Helmholtz-Zentrum Dresden-Rossendorf (HZDR) - Institute of Ion Beam Physics and Materials Research and Helmholtz-Zentrum Dresden-Rossendorf (HZDR) - Institute of Ion Beam Physics and Materials Research