1. Department of Physics National Taiwan University Taipei 10617 Taiwan
2. Institute of Atomic and Molecular Sciences Academia Sinica Taipei 106319 Taiwan
3. International Ph.D. Program in Biomedical Engineering College of Biomedical Engineering Taipei Medical University New Taipei City 235603 Taiwan
4. Department of Chemistry National Tsing Hua University Hsinchu 300044 Taiwan
5. International Graduate Program of Molecular Science and Technology National Taiwan University Taipei City 106319 Taiwan
6. Center for Condensed Matter Sciences National Taiwan University Taipei 10617 Taiwan
7. Center of Atomic Initiative for New Materials National Taiwan University Taipei 10617 Taiwan
8. National Center for Theoretical Sciences Taipei 10617 Taiwan