Affiliation: | (1) Department of Physics, College of Science, Korea University, Seoul, 136-701, Korea;(2) The Research Institute of Basic Science, Korea University, Seoul, 136-701, Korea;(3) Department of Physics, Seonam University, Namwon, Chunbuk, 590-170, Korea;(4) Office of the Chancellor/Departments and Chemistry and Physics & Astronomy, University of Wisconsin-Stevens Point, Stevens Point, Wisconsin 54481-3897, USA;(5) Departments of Chemistry and Physics, Washington State University, Pullman, Washington 99164-4630, USA |