1. College of Materials Science and Engineering, Chongqing University, Chongqing400044, China
2. Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and Advanced Materials, Chongqing University, Chongqing400044, China
3. College of Physics and Center of Quantum Materials and Devices, Chongqing University, Chongqing401331, China