1. Geophysical
Laboratory, Carnegie Institution of Washington, Washington, DC 20015, United States
2. Center for High Pressure Science and Technology Advanced Research, P.O. Box 8009, Beijing 100088, China
3. Center for High Pressure Science and Technology Advanced Research, 1690 Cailun Rd., Pudong, Shanghai 201203, P.R. China
4. HiPSEC and Department of Physics & Astronomy, University of Nevada, Las Vegas, Nevada 89154, United States