1. Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
2. Department of Physics, National Central University, Taoyuan 32001, Taiwan
3. Molecular Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei 10617, Taiwan
4. Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan
5. Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Straße 15, Berlin 12489, Germany
6. Center of Atomic Initiative for New Materials, National Taiwan University, Taipei 10617, Taiwan
7. Tabbin Institute for Metallurgical Studies, Tabbin, Helwan 109, Cairo 11421, Egypt