Center of Applied Superconductivity and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu, 610054, China, and Nano & Micro-Systems Research Lab, Mechanical & Mechatronics Engineering Department, University of Waterloo, Waterloo, ON, N2L 3G1, Canada;
Nano & Micro=Systems Research Lab, Mechanical & Mcchatronics Engineering Department, University of Waterloo, Waterloo, ON, N2L 3GI, Canada;
Center of Applied Superconductivity and Electrical Engineering, University of Electronic Science and Technology of China, Chcngdu, 610054, China;