Template for Electronic Submission to ACS Journals

6Department of Physics, Sogang University, Seoul 121-742, Korea. 7Electrical Engineering, University of Cambridge, Cambridge CB3 0FA, United Kingdom. 8Pohang Accelerator Laboratory, Pohang, Kyungbuk 790-784, Korea. 9National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu 30076, Taiwan †These authors contributed equally to ... ................
................