1. Materials Science and Nano Engineering Rice University Houston TX 77005 USA
2. Center for Nanophase Materials Sciences Oak Ridge National Laboratory Oak Ridge TN 37831 USA
3. Collaboratory for Advanced Computing and Simulations Department of Physics and Astronomy Department of Computer Science Department of Chemical Engineering and Materials Science Department of Biological Sciences University of Southern California Los Angeles CA 90089 USA
4. Department of Physics Kumamoto University Kumamoto 860‐8555 Japan