| Affiliation: | 1. Department of Applied Physics, National Pingtung University of Education, 4-18, Minsheng Road, Pingtung 90044, Taiwan, ROC;2. Department of Applied Physics, National University of Kaohsiung, 700, Kaohsiung University Road, Kaohsiung 81148, Taiwan, ROC;3. Department of Engineering and System Science, National Tsing-Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu 30013, Taiwan, ROC;4. National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu 30013, Taiwan, ROC;5. Institut für Festkörperphysik, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany |
