1. California
NanoSystems Institute and Materials Department, University of California, Santa
Barbara, California 93106, United States
2. Tohoku
University WPI-AIMR and CNSI Joint Center, University of California, Santa
Barbara, California 93106, United States
3. Beijing Computational
Science Research Center, Beijing 10084, P. R. China
4. Materials
Research Laboratory, University of California, Santa Barbara, California 93106, United States
5. Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States