1. State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, Shandong 250100, People’s Republic of China
2. Shandong Provincial Key Laboratory of Monocrystalline Silicon Semiconductor Materials and Technology, Dezhou University, Dezhou 253023, People’s Republic of China
3. School of Civil Engineering, Shandong Jiaotong University, Jinan, Shandong 250023, People’s Republic of China
4. School of Physics, Shandong University, Jinan, Shandong 250100, People’s Republic of China