1. Department of Materials Science and Engineering
2. National Taiwan University of Science and Technology
3. Taipei
4. Taiwan
5. Laboratoire de Physique des Solides
6. Université Paris Sud
7. CNRS UMR 8502
8. F-91405 Orsay
9. France
10. National Chung Hsing University
11. Taichung 402
12. Innovation and Development Center of Sustainable Agriculture