1. Department
of Chemistry and Biochemistry, California State University, Northridge, California 91330, United States
2. Beijing Computational Science Research Center, Beijing 10094, P. R. China
3. Institute
of Condensed Matter Physics, Linyi University, Linyi 276005, P. R. China
4. Department
of Earth Science, University of California, Santa Barbara, California 93106, United States
5. Department
of Chemistry, University of Houston, Houston, Texas 77204-5003, United States
6. Faculty
of
Physics, University of Vienna, Sensengasse 8/12 A-1090 Wien, Austria