1. Institute of Materials École Polytechnique Fédérale de Lausanne Station 12 Lausanne 1015 Switzerland
2. Computational Sciences and Engineering Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA
3. Center for Nanophase Materials Sciences Oak Ridge National Laboratory Oak Ridge TN 37831 USA
4. Bredesen Center for Interdisciplinary Research University of Tennessee Knoxville TN 37996 USA