1. University of Michigan – Shanghai Jiao Tong University Joint Institute Shanghai Jiao Tong University Shanghai 200240 China
2. Center for High Pressure Science & Technology Advanced Research (HPSTAR) Shanghai 201203 China
3. Laboratory for High Performance Ceramics Empa ‐ Swiss Federal Laboratories for Materials Science and Technology Dübendorf CH‐8600 Switzerland
4. Département de Génie Physique Polytechnique Montréal and Réseau Québecois sur des Matériaux de Pointe (RQMP) CP 6079, Succursale C.‐V. Montréal QC H3C 3A7 Canada