1. Key Laboratory for Micro‐Nano Physics and Technology of Hunan ProvinceCollege of Materials Science and EngineeringHunan University Changsha 410082 China
2. Key Laboratory for Micro‐Nano Physics and Technology of Hunan ProvinceSchool of Physics and ElectronicsHunan University Changsha 410082 China
3. Computer and Information Engineering CollegeCentral South University of Forestry and Technology Changsha 410004 China
4. State Key Laboratory of Superlattices and MicrostructuresInstitute of SemiconductorsChinese Academy of Sciences & CAS Center of Excellence in Topological Quantum ComputationUniversity of Chinese Academy of Sciences Beijing 10083 China
5. Institute for Integrative NanosciencesIFW Dresden 01069 Dresden Germany
6. Department of Materials Science and EngineeringUniversity of Pennsylvania Philadelphia PA 19104 USA