1. Fujian Provincial Engineering Technology Research Center of Solar Energy Conversion and Energy Storage College of Physics and Energy Fujian Normal University Fuzhou 350117 China
2. Fujian Provincial Collaborative Innovation Center for Advanced High‐Field Superconducting Materials and Engineering Fuzhou 350117 China
3. Key Laboratory of Artificial Micro‐ and Nano‐structures of Ministry of Education and School of Physics and Technology Wuhan University Wuhan 430072 China