1. Leibniz Institute for Solid State and Materials Research (IFW) Dresden, Institute for Metallic Materials, Helmholtzstrasse 20, D-01069 Dresden, Germany
2. Institute of Natural Sciences, Ural Federal University, 620002 Ekaterinburg, Russia
3. State Key Laboratory of Low-Dimensional Quantum Physics, and Department of Physics, Tsinghua University, Beijing 100084, China
4. Collaborative Innovation Center of Quantum Matter, Beijing 100084, China
5. Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
6. Institute for Materials Science, TU Dresden, 01062 Dresden, Germany